Qt 4.8.1 Cannot release debugged app for windows.

[notes90]

DLL's for debug version have letter d in name. Ie. QtCore4.dll fo release mode and QtCore4d.dll for debug mode.

Yes, I have QtCore4.dll in my release folder and all other qt dll's needed for app, in this case network and gui.
I've copied qtCored4.dll to debug folder and other dll's with 'd' letter and after clicking on .exe i get error :

The procedure entry point ?checkStateSet@AbstractButton@@MAEXXZ could not be located in the dynamic link library QtGuid4.dll

I want to underline that debug version is running well through Qt Creator...

Anyone ?