Deploying a hello world program on windows:Entry Point Not Found

[thefatladysingsopera]

I am trying to deploy a hello world program in windows and i am getting this error:

The procedure entry point _Z5qFreePv could not be located in the dynamic link library QtCore4.dll

I have built my exe in release mode and i have the following dlls residing in the same folder the exe is in:

-QtCore4.dll
-QtGui4.dll
-libgcc_s_dw2-1.dll
-mingwm10.dll

What could be the problem.