diff --git a/DataBaseLMS/databaselms.cpp b/DataBaseLMS/databaselms.cpp
index b1a0771..de735f3 100644
--- a/DataBaseLMS/databaselms.cpp
+++ b/DataBaseLMS/databaselms.cpp
@@ -9,9 +9,9 @@
 const QString DataBaseLMS::TypeUserDBInstructor = "instructor";
 const QString DataBaseLMS::TypeUserDBTrainee = "trainee";
 
-DataBaseLMS::DataBaseLMS(QWidget *ownerWidget):
+DataBaseLMS::DataBaseLMS(QWidget *ownerWidget, QObject *parent):
+    QObject(parent),
     db(nullptr),
-    transactionBegined(false),
     ownerWidget(ownerWidget)
 {
 
@@ -22,6 +22,12 @@ DataBaseLMS::~DataBaseLMS()
     deleteConnection();
 }
 
+void DataBaseLMS::slot_LanguageChanged(QString language)
+{
+    qtLanguageTranslator.load(QString(QStringLiteral("translations/DataBaseLMS_")) + language, QStringLiteral("."));
+    QCoreApplication::installTranslator(&qtLanguageTranslator);
+}
+
 bool DataBaseLMS::createConnection()
 {
     dbSettings = getDataBaseSettings();
@@ -52,9 +58,6 @@ bool DataBaseLMS::createConnection()
 
 void DataBaseLMS::deleteConnection()
 {
-    if(transactionBegined)
-        QSqlDatabase::database().rollback();
-
     if(db != nullptr)
     {
         if(db->isOpen())
@@ -87,7 +90,7 @@ DataBaseSettings DataBaseLMS::getDataBaseSettings()
     QFile file("config/settings.xml");
     if(!file.open(QIODevice::ReadOnly))
     {
-        QMessageBox::critical(ownerWidget, "Attention!", "The file could not be opened: config/settings.xml");
+        QMessageBox::critical(ownerWidget, tr("Attention!"), tr("The file could not be opened:") + "config/settings.xml");
         return settings;
     }
     QXmlStreamReader xmlReader(&file);
diff --git a/DataBaseLMS/databaselms.h b/DataBaseLMS/databaselms.h
index a1dbc0b..344f6dd 100644
--- a/DataBaseLMS/databaselms.h
+++ b/DataBaseLMS/databaselms.h
@@ -4,6 +4,7 @@
 #include <QSqlDatabase>
 #include <QMutex>
 #include <QWidget>
+#include <QTranslator>
 
 #include "instructor.h"
 #include "trainee.h"
@@ -23,12 +24,17 @@ public:
     int dbPort = 5432;
 };
 
-class DataBaseLMS
+class DataBaseLMS : public QObject
 {
+    Q_OBJECT
+
 public:
-    DataBaseLMS(QWidget *ownerWidget);
+    DataBaseLMS(QWidget *ownerWidget, QObject *parent = nullptr);
     ~DataBaseLMS();
 
+public Q_SLOTS:
+    void slot_LanguageChanged(QString language);
+
 public:
     static const QString TypeUserDBInstructor;
     static const QString TypeUserDBTrainee;
@@ -110,9 +116,9 @@ private:
 protected:
     QSqlDatabase* db;
     DataBaseSettings dbSettings;
+    QTranslator qtLanguageTranslator;
 
 private:
-    bool transactionBegined;    
     QWidget* ownerWidget;
 };
 
diff --git a/DataBaseLMS/interfacedatabaselms.cpp b/DataBaseLMS/interfacedatabaselms.cpp
index 4be22c3..5e15677 100644
--- a/DataBaseLMS/interfacedatabaselms.cpp
+++ b/DataBaseLMS/interfacedatabaselms.cpp
@@ -6,25 +6,19 @@
 #include "interfacedatabaselms.h"
 
 InterfaceDataBaseLMS::InterfaceDataBaseLMS(QWidget *ownerWidget, QObject *parent):
-    QObject(parent),
-    DataBaseLMS(ownerWidget),
+    //QObject(parent),
+    DataBaseLMS(ownerWidget, parent),
     ownerWidget(ownerWidget)
 {
 
 }
 
-void InterfaceDataBaseLMS::slot_LanguageChanged(QString language)
-{
-    qtLanguageTranslator.load(QString(QStringLiteral("translations/DataBaseLMS_")) + language, QStringLiteral("."));
-    QCoreApplication::installTranslator(&qtLanguageTranslator);
-}
-
 bool InterfaceDataBaseLMS::connectionToDB()
 {
     //QMutexLocker mtxLocker(&mtxAccess);
     if(!createConnection())
     {
-        QMessageBox::critical(ownerWidget, dbSettings.dbName, tr("Connection error: ") + db->lastError().text());
+        QMessageBox::critical(ownerWidget, dbSettings.dbName, tr("Connection error") /*+ db->lastError().text()*/);
         return false;
     }
     else
diff --git a/DataBaseLMS/interfacedatabaselms.h b/DataBaseLMS/interfacedatabaselms.h
index 6668637..a5b7504 100644
--- a/DataBaseLMS/interfacedatabaselms.h
+++ b/DataBaseLMS/interfacedatabaselms.h
@@ -8,16 +8,13 @@
 #include "DataBaseLMS_global.h"
 #include "databaselms.h"
 
-class DATABASELMS_EXPORT InterfaceDataBaseLMS : public QObject,  DataBaseLMS
+class DATABASELMS_EXPORT InterfaceDataBaseLMS : public /*QObject,*/  DataBaseLMS
 {
-    Q_OBJECT
+    //Q_OBJECT
 
 public:
     InterfaceDataBaseLMS(QWidget *ownerWidget, QObject *parent = nullptr);
 
-public Q_SLOTS:
-    void slot_LanguageChanged(QString language);
-
 public:
     //Соединение
     bool connectionToDB();
@@ -102,8 +99,7 @@ public:
     int changeStatusTaskFIM(int id_task, QString status);
     int changeStatusTaskAMM(int id_task, QString status);
 
-private:
-    QTranslator qtLanguageTranslator;
+private:    
     QWidget* ownerWidget;
     //QMutex mtxAccess;
 };
diff --git a/ServerLMS/providerdblms.cpp b/ServerLMS/providerdblms.cpp
index f4e82eb..0359d0b 100644
--- a/ServerLMS/providerdblms.cpp
+++ b/ServerLMS/providerdblms.cpp
@@ -1,12 +1,14 @@
 #include "providerdblms.h"
 
 #include <QThread>
+#include <QMessageBox>
 
 ProviderDBLMS::ProviderDBLMS(QWidget *parentWidget, QObject *parent) :
     QObject(parent),
-    dbLMS(nullptr)
+    dbLMS(nullptr),
+    parentWidget(parentWidget)
 {
-    dbLMS = new InterfaceDataBaseLMS(/*parentWidget*/nullptr);
+    dbLMS = new InterfaceDataBaseLMS(parentWidget);
     //ConnectionToDB();
 }
 
diff --git a/ServerLMS/providerdblms.h b/ServerLMS/providerdblms.h
index 58835b3..b5e9f7b 100644
--- a/ServerLMS/providerdblms.h
+++ b/ServerLMS/providerdblms.h
@@ -81,6 +81,7 @@ public:
 private:
     InterfaceDataBaseLMS* dbLMS;
     QMutex mtxAccess;
+    QWidget *parentWidget;
 };
 
 #endif // PROVIDERDBLMS_H
diff --git a/ServerLMS/serverlmswidget.h b/ServerLMS/serverlmswidget.h
index 77b8357..e958583 100644
--- a/ServerLMS/serverlmswidget.h
+++ b/ServerLMS/serverlmswidget.h
@@ -67,7 +67,7 @@ public slots:
     void slot_LanguageChanged(QString language);
     void slotUpdateListClients();
     void slot_BlockAutorization(bool block);
-    void addToLog(QString message);
+    void addToLog(QString message);    
 public:
     void removeClient(int socketId);