diff --git a/DataBaseLMS/databaselms_tasks.cpp b/DataBaseLMS/databaselms_tasks.cpp
index c2d31fa..adc1d1a 100644
--- a/DataBaseLMS/databaselms_tasks.cpp
+++ b/DataBaseLMS/databaselms_tasks.cpp
@@ -404,7 +404,7 @@ int DataBaseLMS::deleteTaskFIM(int id_task)
             report_id = queryReportsSEL.value(0).toInt();
         }
     }
-    if(!report_id)
+    else
     {
         resBool = db->rollback();
         return 0;
diff --git a/DataBaseLMS/databaselms_trainees.cpp b/DataBaseLMS/databaselms_trainees.cpp
index 5a20583..e447ab0 100644
--- a/DataBaseLMS/databaselms_trainees.cpp
+++ b/DataBaseLMS/databaselms_trainees.cpp
@@ -267,8 +267,8 @@ int DataBaseLMS::deleteTrainee(int id_trainee)
                     int mulf_id = queryMulfSEL.value(0).toInt();
 
                     /*Удаление сигналов для этой неисправности*/
-                    queryStr = QString("DELETE FROM public.mals_signs "
-                                                                     "WHERE mals_signs.fk_mulfunction_id = %1 ").arg(
+                    queryStr = QString("DELETE FROM public.malf_signs "
+                                                                     "WHERE malf_signs.fk_malfunction_id = %1 ").arg(
                                                                             mulf_id);
                     QSqlQuery querySign = QSqlQuery(*db);
                     if(!queryExec(queryStr, &querySign))
diff --git a/DataBaseLMS/interfacedatabaselms.cpp b/DataBaseLMS/interfacedatabaselms.cpp
index 32ee3c2..4be22c3 100644
--- a/DataBaseLMS/interfacedatabaselms.cpp
+++ b/DataBaseLMS/interfacedatabaselms.cpp
@@ -123,37 +123,6 @@ int InterfaceDataBaseLMS::delInstructor(int id)
 int InterfaceDataBaseLMS::editInstructor(Instructor instructor)
 {
     //QMutexLocker mtxLocker(&mtxAccess);
-
-    //Проверка корректности логина, имени, пароля
-
-    if(instructor.getName() == QStringLiteral("<name>"))
-    {//Имя не корректно!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("Unacceptable instructor name has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
-    if(instructor.getLogin() == QStringLiteral("<login>"))
-    {//Логин не корректен!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("Unacceptable instructor login has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
-    if(instructor.getPassword() == QStringLiteral("<password>"))
-    {//Пароль не корректный!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("Unacceptable instructor password has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
-    if(selectUserID(DataBaseLMS::TypeUserDBInstructor, instructor.getLogin()) ||  selectUserID(DataBaseLMS::TypeUserDBTrainee, instructor.getLogin()))
-    {//Логин уже существует!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("An existing instructor or trainee login has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
     return updateInstructor(instructor);
 }
 
@@ -324,26 +293,6 @@ int InterfaceDataBaseLMS::delGroup(int id)
 int InterfaceDataBaseLMS::editGroup(Group group)
 {
     //QMutexLocker mtxLocker(&mtxAccess);
-
-    //Проверка корректности имени
-    QList<Group> listGroups = selectAllGroups();
-    for(Group exist_group : listGroups)
-    {
-        if(group.getName() == QStringLiteral("<group>"))
-        {//Имя не корректно!
-            QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                                  tr("Unacceptable group name has been entered.\nThe changes will not be accepted."));
-            return 0;
-        }
-
-        if(group.getName() == exist_group.getName() && group.getID() != exist_group.getID())
-        {//Имя уже существует
-            QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                                  tr("An existing group name has been entered.\nThe changes will not be accepted."));
-            return 0;
-        }
-    }
-
     return updateGroup(group);
 }
 
@@ -440,37 +389,6 @@ int InterfaceDataBaseLMS::delTrainee(int id)
 int InterfaceDataBaseLMS::editTrainee(Trainee trainee)
 {
     //QMutexLocker mtxLocker(&mtxAccess);
-
-    //Проверка корректности логина, имени, пароля
-
-    if(trainee.getName() == QStringLiteral("<trainee>"))
-    {//Имя не корректно!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("Unacceptable trainee name has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
-    if(trainee.getLogin() == QStringLiteral("<login>"))
-    {//Логин не корректен!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("Unacceptable trainee login has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
-    if(trainee.getPassword() == QStringLiteral("<password>"))
-    {//Пароль не корректный!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("Unacceptable trainee password has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
-    if(selectUserID(DataBaseLMS::TypeUserDBInstructor, trainee.getLogin()) ||  selectUserID(DataBaseLMS::TypeUserDBTrainee, trainee.getLogin()))
-    {//Логин уже существует!
-        QMessageBox::critical(ownerWidget, tr("Editing error!"),
-                              tr("An existing instructor or trainee login has been entered.\nThe changes will not be accepted."));
-        return 0;
-    }
-
     return updateTrainee(trainee);
 }
 
diff --git a/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp b/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
index 71c46db..0236a8d 100644
--- a/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
+++ b/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
@@ -295,6 +295,16 @@ int ConnectorToServer::getIdTraineeByLogin(QString login)
     return 0;
 }
 
+int ConnectorToServer::getIdInstructorByLogin(QString login)
+{
+    for(Instructor instructor : listInstructors)
+    {
+        if(instructor.getLogin() == login)
+            return instructor.getID();
+    }
+    return 0;
+}
+
 void ConnectorToServer::showVersionSelect()
 {
     QByteArray answer = dataParser->xmlAnswer_notify(cmd_CheckVersionList);
diff --git a/InstructorsAndTrainees/connectorToServer/connectortoserver.h b/InstructorsAndTrainees/connectorToServer/connectortoserver.h
index d490fb5..4ffa61a 100644
--- a/InstructorsAndTrainees/connectorToServer/connectortoserver.h
+++ b/InstructorsAndTrainees/connectorToServer/connectortoserver.h
@@ -60,6 +60,7 @@ public:
     Group getGroup(int id);
 
     int getIdTraineeByLogin(QString login);
+    int getIdInstructorByLogin(QString login);
     void showVersionSelect();
 
     void setLoginName(QString name);
diff --git a/InstructorsAndTrainees/instructors/editorinstructors.cpp b/InstructorsAndTrainees/instructors/editorinstructors.cpp
index 5aceb87..dd8fb02 100644
--- a/InstructorsAndTrainees/instructors/editorinstructors.cpp
+++ b/InstructorsAndTrainees/instructors/editorinstructors.cpp
@@ -270,7 +270,7 @@ bool EditorInstructors::verifyInstructor(Instructor instructor)
 {
     //Проверка корректности логина, имени, пароля
 
-    if(instructor.getName() == QStringLiteral("<instructor>"))
+    if(instructor.getName() == QStringLiteral("<name>"))
     {//Имя не корректно!
         QMessageBox::critical(this, tr("Editing error!"),
                               tr("Unacceptable instructor name has been entered.\nThe changes will not be accepted."));
@@ -292,23 +292,13 @@ bool EditorInstructors::verifyInstructor(Instructor instructor)
     }
 
 
-    QList<Instructor> listInstructors = connectorToServer->getListInstructors();
-
-    for(Instructor exist_instructor : listInstructors)
-    {
-        if(instructor.getName() == exist_instructor.getName() && instructor.getID() != exist_instructor.getID())
-        {//Имя уже существует
-            QMessageBox::critical(this, tr("Editing error!"),
-                                  tr("An existing instructor name has been entered."));
-            return false;
-        }
-
-        if(instructor.getLogin() == exist_instructor.getLogin() && instructor.getID() != exist_instructor.getID())
-        {//Логин уже существует!
-            QMessageBox::critical(this, tr("Editing error!"),
-                                  tr("An existing instructor login has been entered.\nThe changes will not be accepted."));
-            return false;
-        }
+    int user_I = connectorToServer->getIdInstructorByLogin(instructor.getLogin());
+    int user_T = connectorToServer->getIdTraineeByLogin(instructor.getLogin());
+    if((user_I && (user_I != instructor.getID())) ||  (user_T && (user_T != instructor.getID())))
+    {//Логин уже существует!
+        QMessageBox::critical(this, tr("Editing error!"),
+                              tr("An existing instructor or trainee login has been entered.\nThe changes will not be accepted."));
+        return 0;
     }
 
     return true;
diff --git a/InstructorsAndTrainees/trainees/editortrainees.cpp b/InstructorsAndTrainees/trainees/editortrainees.cpp
index 0f59340..ccbf4f4 100644
--- a/InstructorsAndTrainees/trainees/editortrainees.cpp
+++ b/InstructorsAndTrainees/trainees/editortrainees.cpp
@@ -24,6 +24,13 @@ EditorTrainees::EditorTrainees(ConnectorToServer* connectorToServer, bool adminM
         ui->btnArchive->click();
 
     waitAnimationWidget->setParent(this);
+
+    ui->btnNewGroup->setEnabled(true);
+    ui->btnDeleteGroup->setEnabled(false);
+    ui->btnNewTrainee->setEnabled(false);
+    ui->btnDeleteTrainee->setEnabled(false);
+    ui->btnToOrFromArchiveTrainee->setEnabled(false);
+    ui->btnEdit->setEnabled(false);
 }
 
 EditorTrainees::~EditorTrainees()
@@ -448,7 +455,7 @@ bool EditorTrainees::verifyTrainee(Trainee trainee)
 {
     //Проверка корректности логина, имени, пароля
 
-    if(trainee.getName() == QStringLiteral("<trainee>"))
+    if(trainee.getName() == QStringLiteral("<name>"))
     {//Имя не корректно!
         QMessageBox::critical(this, tr("Editing error!"),
                               tr("Unacceptable trainee name has been entered.\nThe changes will not be accepted."));
@@ -469,23 +476,14 @@ bool EditorTrainees::verifyTrainee(Trainee trainee)
         return false;
     }
 
-    QList<Trainee> listTrainees = connectorToServer->getListTrainees();
 
-    for(Trainee exist_trainee : listTrainees)
-    {
-        if(trainee.getName() == exist_trainee.getName() && trainee.getID() != exist_trainee.getID())
-        {//Имя уже существует
-            QMessageBox::critical(this, tr("Editing error!"),
-                                  tr("An existing trainee name has been entered."));
-            return false;
-        }
-
-        if(trainee.getLogin() == exist_trainee.getLogin() && trainee.getID() != exist_trainee.getID())
-        {//Логин уже существует!
-            QMessageBox::critical(this, tr("Editing error!"),
-                                  tr("An existing trainee login has been entered.\nThe changes will not be accepted."));
-            return false;
-        }
+    int user_I = connectorToServer->getIdInstructorByLogin(trainee.getLogin());
+    int user_T = connectorToServer->getIdTraineeByLogin(trainee.getLogin());
+    if((user_I && (user_I != trainee.getID())) ||  (user_T && (user_T != trainee.getID())))
+    {//Логин уже существует!
+        QMessageBox::critical(this, tr("Editing error!"),
+                              tr("An existing instructor or trainee login has been entered.\nThe changes will not be accepted."));
+        return 0;
     }
 
     return true;
diff --git a/ServerLMS/Systems/processingsystem.cpp b/ServerLMS/Systems/processingsystem.cpp
index 38083bd..5858d02 100644
--- a/ServerLMS/Systems/processingsystem.cpp
+++ b/ServerLMS/Systems/processingsystem.cpp
@@ -8,10 +8,7 @@ ProcessingSystem::ProcessingSystem(ProviderDBLMS* providerDBLMS, UpdateControlle
     updateController(nullptr),
     providerDBLMS(nullptr)
 {
-    //this->providerDBLMS = providerDBLMS;
-
-
-
+    this->providerDBLMS = providerDBLMS;
     this->updateController = updateController;
 }
 
@@ -20,10 +17,6 @@ void ProcessingSystem::initialize(MultiThreadServer *server, DataParser *dataPar
                                   UpdateController *updateController,
                                   ChatSystem *chatSystem)
 {
-    this->providerDBLMS = new ProviderDBLMS(/*parent*/nullptr);
-    this->providerDBLMS->ConnectionToDB();
-    this->providerDBLMS->deAuthorizationAll();
-
     this->commonClientServer = commonClientHandler;
     this->dataParser = dataParser;
     this->server = server;
diff --git a/ServerLMS/providerdblms.cpp b/ServerLMS/providerdblms.cpp
index d851db4..f4e82eb 100644
--- a/ServerLMS/providerdblms.cpp
+++ b/ServerLMS/providerdblms.cpp
@@ -224,18 +224,32 @@ bool ProviderDBLMS::deAuthorizationAll()
 
 bool ProviderDBLMS::entryTraineeOnSimulator(int id_trainee)
 {
+    mtxAccess.lock();
     if(dbLMS->entryTraineeOnSimulator(id_trainee))
+    {
+        mtxAccess.unlock();
         return true;
+    }
     else
+    {
+        mtxAccess.unlock();
         return false;
+    }
 }
 
 bool ProviderDBLMS::exitTraineeFromSimulator(int id_trainee)
 {
+    mtxAccess.lock();
     if(dbLMS->exitTraineeFromSimulator(id_trainee))
+    {
+        mtxAccess.unlock();
         return true;
+    }
     else
+    {
+        mtxAccess.unlock();
         return false;
+    }
 }
 
 int ProviderDBLMS::getIdTraineeByLogin(QString login)
@@ -348,92 +362,164 @@ QList<Group> ProviderDBLMS::GetListAllGroups()
 
 int ProviderDBLMS::newInstructor()
 {
-    return dbLMS->newInstructor();
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->newInstructor();
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::delInstructor(int id)
 {
-    return dbLMS->delInstructor(id);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->delInstructor(id);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::editInstructor(Instructor instructor)
 {
-    return dbLMS->editInstructor(instructor);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->editInstructor(instructor);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::newTrainee(int id_group)
 {
-    return dbLMS->newTrainee(id_group);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->newTrainee(id_group);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::delTrainee(int id)
 {
-    return dbLMS->delTrainee(id);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->delTrainee(id);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::editTrainee(Trainee trainee)
 {
-    return dbLMS->editTrainee(trainee);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->editTrainee(trainee);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::newGroup()
 {
-    return dbLMS->newGroup();
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->newGroup();
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::delGroup(int id)
 {
-    return dbLMS->delGroup(id);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->delGroup(id);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::editGroup(Group group)
 {
-    return dbLMS->editGroup(group);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->editGroup(group);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::newTaskAMM(TaskAmmFim task, int id_trainee)
 {
-    return dbLMS->newTaskAMM(task, id_trainee);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->newTaskAMM(task, id_trainee);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::delTaskAMM(int id)
 {
-    return dbLMS->delTaskAMM(id);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->delTaskAMM(id);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::editTaskAMM(TaskAmmFim task)
 {
-    return dbLMS->editTaskAMM(task);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->editTaskAMM(task);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::newTaskFIM(TaskAmmFim task, int id_trainee)
 {
-    return dbLMS->newTaskFIM(task, id_trainee);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->newTaskFIM(task, id_trainee);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::delTaskFIM(int id)
 {
-    return dbLMS->delTaskFIM(id);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->delTaskFIM(id);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::editTaskFIM(TaskAmmFim task)
 {
-    return dbLMS->editTaskFIM(task);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->editTaskFIM(task);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::replaceReportFIM(TaskAmmFim task)
 {
-    return dbLMS->replaceReportFIM(task);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->replaceReportFIM(task);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::changeStatusTaskFIM(int id_task, QString status)
 {
-    return dbLMS->changeStatusTaskFIM(id_task, status);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->changeStatusTaskFIM(id_task, status);
+    mtxAccess.unlock();
+    return res;
 }
 
 int ProviderDBLMS::changeStatusTaskAMM(int id_task, QString status)
 {
-    return dbLMS->changeStatusTaskAMM(id_task, status);
+    int res = 0;
+    mtxAccess.lock();
+    res = dbLMS->changeStatusTaskAMM(id_task, status);
+    mtxAccess.unlock();
+    return res;
 }
 
 QList<TaskAmmFim> ProviderDBLMS::GetListTasksAMMofTrainee(int id_trainee)
diff --git a/ServerLMS/serverlmswidget.cpp b/ServerLMS/serverlmswidget.cpp
index 66b0236..f34194b 100644
--- a/ServerLMS/serverlmswidget.cpp
+++ b/ServerLMS/serverlmswidget.cpp
@@ -16,8 +16,8 @@ ServerLMSWidget::ServerLMSWidget(QWidget *parent) :
     loggerThread(nullptr),
     dataParser(nullptr),
     processingSystem(nullptr),
-    updateController(nullptr)//,
-    //providerDBLMS(nullptr)
+    updateController(nullptr),
+    providerDBLMS(nullptr)
 {
     ui->setupUi(this);
     mutex = new QMutex;
@@ -37,13 +37,13 @@ ServerLMSWidget::ServerLMSWidget(QWidget *parent) :
     updateThread = new QThread;
     loggerThread = new QThread;
 
-    //providerDBLMS = new ProviderDBLMS(this);
-    //providerDBLMS->ConnectionToDB();
-    //providerDBLMS->deAuthorizationAll();
+    providerDBLMS = new ProviderDBLMS(this);
+    providerDBLMS->ConnectionToDB();
+    providerDBLMS->deAuthorizationAll();
 
     chatSystem = new ChatSystem();
 
-    //connect(providerDBLMS, &ProviderDBLMS::signal_BlockAutorization, this, &ServerLMSWidget::slot_BlockAutorization);
+    connect(providerDBLMS, &ProviderDBLMS::signal_BlockAutorization, this, &ServerLMSWidget::slot_BlockAutorization);
 
     assetsManager = new AssetsManager;
     assetsManager->moveToThread(updateThread);
@@ -51,9 +51,8 @@ ServerLMSWidget::ServerLMSWidget(QWidget *parent) :
     updateController = new UpdateController;
     updateController->moveToThread(updateThread);
 
-    processingSystem = new ProcessingSystem(/*providerDBLMS*/nullptr, updateController);
+    processingSystem = new ProcessingSystem(providerDBLMS, updateController);
     //processingSystem->moveToThread(updateThread);
-    //providerDBLMS->moveToThread(updateThread);
 
     dataParser = new DataParser(assetsManager,processingSystem);
 
diff --git a/ServerLMS/serverlmswidget.h b/ServerLMS/serverlmswidget.h
index 789ced0..77b8357 100644
--- a/ServerLMS/serverlmswidget.h
+++ b/ServerLMS/serverlmswidget.h
@@ -103,7 +103,7 @@ private:
     CommonClientHandler *commonClientHandler;
     ChatSystem *chatSystem;
 
-    //ProviderDBLMS* providerDBLMS;
+    ProviderDBLMS* providerDBLMS;
 
     bool first = true; // для тестов Unity