"QSqlDatabase ob" crashes in QT!

in my development pc, the line "QSqlDatabase ob" doesn't crash & works just fine. But in a fresh pc moved the exe and it crashed but if i comment the above line and prepare the exe again it runs fine.

So I installed things that are required in the fresh pc to run qt from visual studio 2005, just to check whats the problem. Transferred the code there bu开发者_开发问答t from visual studio still it crashes for that very same line !!!

What are the dependencies of the simple line "QSqlDatabase ob" ?

I hope I did understand it right.
You compiled your project on your developement PC and want to move the compiled exe to a complete fresh PC, right? Try to copy these files from your Qt4-SDK-installation to your folder with the compiled exe:

• mingwm10.dll
• QtCore4.dll
• QtGui4.dll
• QtSql4.dll

Now you can run your exe on every Windows-PC.