[Release] problem with mysql, relaease build on another machine

[kornicameister]

Hey
I am having a big problem (maybe not so big ), but it stops me from launching my application under another os (to be specific -> virtually installed Xp for testing before final release)
The bug of course does not affect my local release build
I copied all required dll's into {win}\system32 folder from C:\{qtdir}\qt\bin according to the tip from here
coppied dll's file :
- QtSql4.dll (as my application uses MySQL)
- QtCore4.dll
- QtGui4.dll
- mingwm10.dll
- libgcc_s_dw2-1.dll

and additionally, I've copied the following dlls (also from C:\{qtdir}\qt\bin) after bug occurred, but it did not solved the problem
- libmysql.dll
- qsqlmysql4.dll (build by me so as to be able to use mysql in qt programming, so it's not from above folder)

the error I get is on screenshot


I now have no idea how to fix this bug, so any kind of suggestion would be much more than helpful

Tomasz