mingw-compiled Qt app on Windows: Entry Point Not Found?

I am trying to deploy a release version of my Qt app on Windows, with Qt as shared library.

I have put the following Qt-related shared library DLL files in my application directory:

• QtCore4.dll
• QtGui4.dll
• mingwm10.dll
• libgcc_s_dw2-1.dll
• QtContacts_tp.dll (Qt Mobility Contacts DLL)

But I still get this error:

Entry Point Not Found: The procedure entry point _Z15qAddPostRoutinePFvvE could not be located in the dynamic link library QtCore4.dll.

Why is this happening? :-(

Update: Thanks to this QtForum.org thread, it happened because I used the QtCore4.dll and QtGui4.dll from C:\Qt\2010.01\bin. After I used the DLLs from C:\Qt\2010.01\qt\bin, my application works fine! :-)

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