Problem in executing SqLite Query in C++ project

Hello,
I am trying to connect to database SBS.sqlite using QT.
I sucessfully connect my database but I couldn't execute query.

I have attatched mainwindow.cpp and mainwindow.h with this thread.
The problem I mentioned is invoid MainWindow::on_registerButton_2_clicked() function.

Firstz make sure that the table really exists, and then you should also bind the values you want to store in the db

Now,I have done it. But the problem is same. It would not execute query.

Then you should take a look at QSqlQuery::lastError() after preparing and executing your query.