diff --git a/InstructorsAndTrainees/connectorToServer/Core/tcpclient.cpp b/InstructorsAndTrainees/connectorToServer/Core/tcpclient.cpp
index 750e90c..86b9151 100644
--- a/InstructorsAndTrainees/connectorToServer/Core/tcpclient.cpp
+++ b/InstructorsAndTrainees/connectorToServer/Core/tcpclient.cpp
@@ -56,7 +56,13 @@ void TCPClient::setConnect(ServerSettings *serverSettings)
 
 void TCPClient::setDisconnect()
 {
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+    stream << PacketType::TYPE_DISABLE;
+
+
     socket->disconnect();
+
     isConnected = false;
     emit sigServerDisconnect();
     emit sigSendDebugLog("Server disabled");
diff --git a/InstructorsAndTrainees/connectorToServer/Core/tcpclient.h b/InstructorsAndTrainees/connectorToServer/Core/tcpclient.h
index 12cb766..4c0b790 100644
--- a/InstructorsAndTrainees/connectorToServer/Core/tcpclient.h
+++ b/InstructorsAndTrainees/connectorToServer/Core/tcpclient.h
@@ -26,6 +26,7 @@ public:
     explicit TCPClient(QObject *parent = 0);
     void initialize(RecognizeSystem *recognize,SendSystem *sendSystem);
     void setConnect(ServerSettings *serverSettings);
+    void setDisconnect();
 
     void waitRead(int time);
     QTcpSocket* getSocket();
@@ -54,9 +55,7 @@ private:
     SendSystem *sendSystem;
     QTcpSocket *socket;
     RecognizeSystem *recognizeSystem;
-    bool isConnected;
-
-    void setDisconnect();
+    bool isConnected;    
 };
 
 #endif // TCPCLIENT_H
diff --git a/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp b/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
index 9d43a29..4ebaa11 100644
--- a/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
+++ b/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
@@ -119,6 +119,12 @@ void ConnectorToServer::SetConnectToServer()
     emit sigSetConnect(dataParser->getServerSettings(),connectionThread);
 }
 
+void ConnectorToServer::StopConnectToServer()
+{
+    emit sigStopConnect();
+    clearListModelDB();
+}
+
 QByteArray ConnectorToServer::getListTaskFimArray()
 {
     return listTaskFimArray;
@@ -287,17 +293,6 @@ void ConnectorToServer::showVersionSelect()
     emit sigSendAnswerToServer(answer);
 }
 
-/*
-void ConnectorToServer::slot_AnswerQueryToDB(QList<Instructor>* listInstructors,
-                                             QList<Trainee>* listTrainees,
-                                             QList<Group>* listGroups)
-{
-    this->listInstructors = *listInstructors;
-    this->listTrainees = *listTrainees;
-    this->listGroups = *listGroups;
-    emit signal_UpdateDB(true, true);
-}*/
-
 void ConnectorToServer::slot_AnswerQueryToDB_ListInstructors(QList<Instructor> listInstructors)
 {
     this->listInstructors = listInstructors;
@@ -320,13 +315,13 @@ void ConnectorToServer::slot_AnswerQueryToDB_ListTrainees(QList<Trainee> listTra
 void ConnectorToServer::slot_AnswerQueryToDB_ListComputers(QList<Computer> listComputers)
 {
     this->listComputers = listComputers;
-    //emit signal_UpdateDB(false, true);
+    //emit signal_UpdateDB(false, true); //TODO
 }
 
 void ConnectorToServer::slot_AnswerQueryToDB_ListClassrooms(QList<Classroom> listClassrooms)
 {
     this->listClassrooms = listClassrooms;
-    //emit signal_UpdateDB(false, true);
+    //emit signal_UpdateDB(false, true); //TODO
 }
 
 void ConnectorToServer::slot_AnswerQueryToDB_ListTasksAMMforTrainee(QList<TaskAmmFim> listTasks, int trainee_id)
@@ -384,11 +379,6 @@ void ConnectorToServer::initialize()
     emit sigInitializeClient(recognizeSystem,sendSystem,connectionThread);
 
     SetConnectToServer();
-    //emit sigSetConnect(dataParser->getServerSettings(),connectionThread);
-
-//    QByteArray answer = dataParser->xmlAnswer_notify()
-//    sendSystem->sendXMLAnswer()
-
 }
 
 void ConnectorToServer::activateLoadAnimation(bool flag)
@@ -407,6 +397,8 @@ void ConnectorToServer::bindConnection()
 {
     connect(this,&ConnectorToServer::sigInitializeClient,client,&TCPClient::initialize,Qt::AutoConnection);
     connect(this,&ConnectorToServer::sigSetConnect,client,&TCPClient::setConnect,Qt::AutoConnection);
+    connect(this,&ConnectorToServer::sigStopConnect,client,&TCPClient::setDisconnect,Qt::AutoConnection);
+
     connect(this,&ConnectorToServer::signal_sendXMLmsgGUItoServer,sendSystem,&SendSystem::sendXMLmsgGUItoServer);
     connect(this,&ConnectorToServer::sigSendAnswerToServer,sendSystem,&SendSystem::sendXMLAnswer,Qt::AutoConnection);
 
@@ -466,3 +458,17 @@ void ConnectorToServer::createObjects()
     connectionThread->start();
     connectionThread->setPriority(QThread::HighestPriority);
 }
+
+void ConnectorToServer::clearListModelDB()
+{
+    listInstructors.clear();
+    listGroups.clear();
+    listTrainees.clear();
+    listComputers.clear();
+    listClassrooms.clear();
+    mapTasksAMM.clear();
+    mapTasksFIM.clear();
+
+    listTaskFimArray.clear();
+    listTaskAmmArray.clear();
+}
diff --git a/InstructorsAndTrainees/connectorToServer/connectortoserver.h b/InstructorsAndTrainees/connectorToServer/connectortoserver.h
index 400eafe..cc56f92 100644
--- a/InstructorsAndTrainees/connectorToServer/connectortoserver.h
+++ b/InstructorsAndTrainees/connectorToServer/connectortoserver.h
@@ -32,6 +32,7 @@ public:
     bool sendQueryTasksXML(QString type);
 
     void SetConnectToServer();
+    void StopConnectToServer();
 
 public:
     QByteArray getListTaskFimArray();
@@ -66,11 +67,8 @@ public:
 
     ServerSettings getServerSettings();
     bool getIsConnected();
-public slots:
-    /*void slot_AnswerQueryToDB(QList<Instructor>* listInstructors,
-                              QList<Trainee>* listTrainees,
-                              QList<Group>* listGroups);*/
 
+public slots:
     void slot_AnswerQueryToDB_ListInstructors(QList<Instructor> listInstructors);
     void slot_AnswerQueryToDB_ListGroups(QList<Group> listGroups);
     void slot_AnswerQueryToDB_ListTrainees(QList<Trainee> listTrainees);
@@ -87,6 +85,7 @@ public slots:
 
 signals:
     void sigSetConnect(ServerSettings* serverSettings,QThread *thread);
+    void sigStopConnect();
     void sigInitializeClient(RecognizeSystem *recognizeSystem,
                             SendSystem *sendSystem,
                             QThread *thread);    
@@ -116,6 +115,9 @@ private:
     void bindConnection();
     void createObjects();
 
+    //Очистка списочной модели БД СУО
+    void clearListModelDB();
+
 private:
     QWidget* parentWidget;
     QThread *connectionThread;
diff --git a/InstructorsAndTrainees/dialogsettings.cpp b/InstructorsAndTrainees/dialogsettings.cpp
index f676228..63574e8 100644
--- a/InstructorsAndTrainees/dialogsettings.cpp
+++ b/InstructorsAndTrainees/dialogsettings.cpp
@@ -9,7 +9,8 @@ DialogSettings::DialogSettings(ConnectorToServer* connectorToServer, bool instru
     QDialog(parent),
     ui(new Ui::DialogSettings),
     settings(nullptr),
-    connectorToServer(nullptr)
+    connectorToServer(nullptr),
+    flSettingsServerChanged(false)
 {
     ui->setupUi(this);
     ui->btnUpdateStyle->setObjectName("btnUpdateStyle");
@@ -41,7 +42,7 @@ DialogSettings::DialogSettings(ConnectorToServer* connectorToServer, bool instru
     //Задаём два пункта с текстом локалей в комбобоксе
     ui->cmbLanguage->addItems(QStringList() << "English" << "Русский");
 
-    if(loadSettings())
+    if(loadSettings(settings))
     {
         if(settings->Language == "ENG")
             ui->cmbLanguage->setCurrentText("English");
@@ -57,9 +58,11 @@ DialogSettings::DialogSettings(ConnectorToServer* connectorToServer, bool instru
     if(connectorToServer)
         if(connectorToServer->getIsConnected())
         {
+            /*
             ui->editAddress->setEnabled(false);
             ui->editPort->setEnabled(false);
             ui->checkAutoStart->setEnabled(false);
+            */
 
             if(instructorIsLogged)
                 ui->btnSetVersion->setEnabled(true);
@@ -68,11 +71,16 @@ DialogSettings::DialogSettings(ConnectorToServer* connectorToServer, bool instru
     ui->label_AutoStart->setVisible(false);
     ui->checkAutoStart->setVisible(false);
 
+    ui->btnSave->setEnabled(false);
+    flSettingsServerChanged = false;
+
+    /*
     if(settings->Language == "ENG")
         qtLanguageTranslator.load(QString("translations/InstructorsAndTraineesWidget_") + "en_EN", ".");
     else
         qtLanguageTranslator.load(QString("translations/InstructorsAndTraineesWidget_") + "ru_RU", ".");
     qApp->installTranslator(&qtLanguageTranslator);
+    */
 }
 
 DialogSettings::~DialogSettings()
@@ -105,7 +113,7 @@ void DialogSettings::on_btnUpdateStyle_clicked()
     emit signal_UpdateStyleSheet();
 }
 
-bool DialogSettings::loadSettings()
+bool DialogSettings::loadSettings(ServerSettings *settings)
 {
     QFile file(settingsName);
     if(! file.open(QIODevice::ReadOnly))
@@ -199,6 +207,7 @@ void DialogSettings::on_btnSave_clicked()
 
     saveSettings();
 
+    /*
     QString language;
 
     if(settings->Language == "ENG")
@@ -207,21 +216,12 @@ void DialogSettings::on_btnSave_clicked()
         language = QString("ru_RU");
 
     emit signal_LanguageChanged(language);
+    */
 
-    this->close();
+    this->accept();
 }
 
-void DialogSettings::on_DialogSettings_rejected()
-{
-    QString language;
 
-    if(settings->Language == "ENG")
-        language = QString("en_EN");
-    else
-        language = QString("ru_RU");
-
-    emit signal_LanguageChanged(language);
-}
 
 void DialogSettings::on_btnSetVersion_clicked()
 {
@@ -229,3 +229,37 @@ void DialogSettings::on_btnSetVersion_clicked()
         if(connectorToServer->getIsConnected())
             connectorToServer->showVersionSelect();
 }
+
+void DialogSettings::on_cmbLanguage_currentIndexChanged(int index)
+{
+    ui->btnSave->setEnabled(true);
+}
+
+void DialogSettings::on_editAddress_textChanged(const QString &arg1)
+{
+    ui->btnSave->setEnabled(true);
+    flSettingsServerChanged = true;
+}
+
+void DialogSettings::on_editPort_textChanged(const QString &arg1)
+{
+    ui->btnSave->setEnabled(true);
+    flSettingsServerChanged = true;
+}
+
+void DialogSettings::on_DialogSettings_rejected()
+{
+
+}
+
+void DialogSettings::on_DialogSettings_accepted()
+{
+    QString language;
+
+    if(settings->Language == "ENG")
+        language = QString("en_EN");
+    else
+        language = QString("ru_RU");
+
+    emit signal_LanguageChanged(language);
+}
diff --git a/InstructorsAndTrainees/dialogsettings.h b/InstructorsAndTrainees/dialogsettings.h
index c9a5280..dad39cd 100644
--- a/InstructorsAndTrainees/dialogsettings.h
+++ b/InstructorsAndTrainees/dialogsettings.h
@@ -21,6 +21,10 @@ public:
 
     ServerSettings getSettings();
 
+    bool settingsServerIsChanged(){ return flSettingsServerChanged;}
+
+    static bool loadSettings(ServerSettings *settings);
+
 protected:
     void changeEvent(QEvent * event) override;
 
@@ -40,8 +44,15 @@ private slots:
 
     void on_btnSetVersion_clicked();
 
-private:
-    bool loadSettings();
+    void on_cmbLanguage_currentIndexChanged(int index);
+
+    void on_editAddress_textChanged(const QString &arg1);
+
+    void on_editPort_textChanged(const QString &arg1);
+
+    void on_DialogSettings_accepted();
+
+private:    
     bool saveSettings();
 
 private:
@@ -50,6 +61,8 @@ private:
 
     ServerSettings *settings;
     ConnectorToServer* connectorToServer;
+
+    bool flSettingsServerChanged;
 };
 
 #endif // DIALOGSETTINGS_H
diff --git a/InstructorsAndTrainees/instructorsandtraineeswidget.cpp b/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
index fd66901..e706985 100644
--- a/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
+++ b/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
@@ -45,7 +45,7 @@ InstructorsAndTraineesWidget::InstructorsAndTraineesWidget(QWidget *parent) :
 
     updateMyStyleSheet();
 
-    on_btnSettings_clicked();
+    setLanguageInterfase();
 
     connectorToServer = new ConnectorToServer(this);
     connect(connectorToServer,&ConnectorToServer::sigLoginResult,this,&InstructorsAndTraineesWidget::checkLoginResult);
@@ -93,46 +93,6 @@ InstructorsAndTraineesWidget::InstructorsAndTraineesWidget(QWidget *parent) :
     ui->verticalLayout_Instructors->addWidget(viewerInstructors);
 
 
-
-
-    /*
-
-    QWidget* wGB2 = new QWidget(this);
-    QHBoxLayout* lGB2 = new QHBoxLayout(this);
-    wGB2->setLayout(lGB2);
-    lGB2->addWidget(ui->groupBox_Tasks);
-    ui->horizontalLayout_3->addWidget(wGB2);
-
-    ui->verticalLayout_41->addWidget(ammTasksWidget);
-    ui->verticalLayout_42->addWidget(fimTasksWidget);
-
-    ui->verticalLayout_2->addWidget(messangerWidget);
-
-    ui->verticalLayout_2->addWidget(viewerInstructors);
-    */
-
-
-    //viewerTrainees->setMinimumSize(900, 500);
-    //viewerTrainees->setMaximumWidth(1050);
-
-
-    /*wGB2->setMinimumSize(500, 500);*/
-    //wGB2->setMaximumWidth(1050);
-
-    //ammTasksWidget->setMinimumSize(1000, 500);
-    //ammTasksWidget->setMaximumWidth(2000);
-    //fimTasksWidget->setMinimumSize(1000, 500);
-    //fimTasksWidget->setMaximumWidth(2000);
-    //ui->tabWidget_Tasks->setMaximumWidth(2000);
-    //ui->groupBox_Tasks->setMaximumWidth(2000);
-
-    //viewerInstructors->setMinimumSize(450, 400);
-    //viewerInstructors->setMaximumWidth(500);
-    //viewerInstructors->setMaximumHeight(400);
-
-    //messangerWidget->setMinimumSize(450, 700);
-    //messangerWidget->setMaximumWidth(500);
-
     ui->groupBox_Messenger->setMaximumWidth(500);
     ui->groupBox_Instructors->setMaximumWidth(500);
 
@@ -176,20 +136,6 @@ void InstructorsAndTraineesWidget::changeEvent(QEvent *event)
     {// переведём окно заново
         ui->retranslateUi(this);
 
-        /*
-        if(ui->btnAuthorizationInstructor->isChecked())
-            ui->btnAuthorizationInstructor->setText(tr("Deauthorization Instructor"));
-        else
-            ui->btnAuthorizationInstructor->setText(tr("Authorization Instructor"));
-            */
-
-        /*
-        if(ui->btnConnectionToDB->isChecked())
-            ui->btnConnectionToDB->setText(tr("Disconnection DB"));
-        else
-            ui->btnConnectionToDB->setText(tr("Connection DB"));
-            */
-
         updateLabelLoggedInInstructor(loginInstructorLoggedInLocal, nameInstructorLoggedInLocal);
         updateLabelServer();
     }
@@ -320,8 +266,11 @@ void InstructorsAndTraineesWidget::slot_ConnectedToServer(bool state)
 
         ui->lblDBisConnected->setPixmap(QPixmap(QStringLiteral(":/resources/icons/circleGreen.png")));
 
-        ServerSettings serverSettings = connectorToServer->getServerSettings();
-        ui->lblServer->setText(serverSettings.Address + ":" +serverSettings.Port);
+        //ServerSettings serverSettings = connectorToServer->getServerSettings();
+        //ui->lblServer->setText(serverSettings.Address + ":" +serverSettings.Port);
+
+        updateLabelLoggedInInstructor(loginInstructorLoggedInLocal, nameInstructorLoggedInLocal);
+        updateLabelServer();
     }
     else
     {//Сервер отключен
@@ -331,7 +280,7 @@ void InstructorsAndTraineesWidget::slot_ConnectedToServer(bool state)
         ui->btnAuthorizationInstructor->setChecked(false);
         //ui->btnSetVersion->hide();
         ui->lblDBisConnected->setPixmap(QPixmap(QStringLiteral(":/resources/icons/circleGray.png")));
-        ui->lblServer->setText(tr("none"));
+        //ui->lblServer->setText(tr("none"));
 
         viewerInstructors->setAuthComplited(false);
         viewerTrainees->setAuthComplited(false);
@@ -347,8 +296,14 @@ void InstructorsAndTraineesWidget::slot_ConnectedToServer(bool state)
 
         messangerWidget->clear();
 
+        loginInstructorLoggedInLocal = "";
+        nameInstructorLoggedInLocal = "";
+
+        updateLabelLoggedInInstructor(loginInstructorLoggedInLocal, nameInstructorLoggedInLocal);
+        updateLabelServer();
+
         QMessageBox::warning(this, tr("Warning!"), tr("The server is disabled"));
-    }
+    }    
 }
 
 bool InstructorsAndTraineesWidget::authorizationInstructorDialog(QWidget* parent)
@@ -470,6 +425,18 @@ void InstructorsAndTraineesWidget::updateLabelServer()
         ui->lblServer->setText(tr("none"));
 }
 
+void InstructorsAndTraineesWidget::setLanguageInterfase()
+{
+    ServerSettings settings;
+    DialogSettings::loadSettings(&settings);
+
+    if(settings.Language == "ENG")
+        qtLanguageTranslator.load(QString("translations/InstructorsAndTraineesWidget_") + "en_EN", ".");
+    else
+        qtLanguageTranslator.load(QString("translations/InstructorsAndTraineesWidget_") + "ru_RU", ".");
+    qApp->installTranslator(&qtLanguageTranslator);
+}
+
 void InstructorsAndTraineesWidget::on_btnSetVersion_clicked()
 {
     connectorToServer->showVersionSelect();
@@ -488,15 +455,24 @@ void InstructorsAndTraineesWidget::on_btnSettings_clicked()
     case QDialog::Accepted:
     {
         language = dlg.getSettings().Language;
+
+        if(dlg.settingsServerIsChanged())
+        {
+            QMessageBox::warning(this, tr("Attention!"), tr("Server settings have been changed. Please reconnect to the server."));
+
+            if(authorizationIsCompleted())
+                deAuthorizationInstructor(loginInstructorLoggedInLocal);
+
+            connectorToServer->StopConnectToServer();
+        }
+
         break;
     }
     case QDialog::Rejected:
         break;
     default:
         break;
-    }
-
-    language = dlg.getSettings().Language;
+    }    
 }
 
 void InstructorsAndTraineesWidget::on_btnEditorTrainees_clicked()
diff --git a/InstructorsAndTrainees/instructorsandtraineeswidget.h b/InstructorsAndTrainees/instructorsandtraineeswidget.h
index 8b1eab9..e32bd63 100644
--- a/InstructorsAndTrainees/instructorsandtraineeswidget.h
+++ b/InstructorsAndTrainees/instructorsandtraineeswidget.h
@@ -85,6 +85,8 @@ private:
     void updateLabelLoggedInInstructor(QString login, QString name);
     void updateLabelServer();
 
+    void setLanguageInterfase();
+
 private:
     Ui::InstructorsAndTraineesWidget *ui;
 
diff --git a/ServerLMS/Systems/recognizesystem.cpp b/ServerLMS/Systems/recognizesystem.cpp
index f77b1df..a864676 100644
--- a/ServerLMS/Systems/recognizesystem.cpp
+++ b/ServerLMS/Systems/recognizesystem.cpp
@@ -433,6 +433,11 @@ void RecognizeSystem::recognize()
 
         }
 
+        if(packetType == PacketType::TYPE_DISABLE)
+        {
+            clientHandler->sendDisable();
+        }
+
         packetType = PacketType::TYPE_NONE;
     }