Error while running in some Windows Xp

[Ayalaskin]

Hi.

Am making a test with QT, to see if it works in every PC, but i had a problem,
I made one program in QT with exactly this code:
http://doc.trolltech.com/4.4/tutorials-tutorial-t1.html
( my QT version is 4.4.3 )

Its just a button that pops, and i have sent it to like 15 friends of mine with this dlls:
QtGui4.dll
QtCore4.dll

The fact is that in around 5 machines, all with XP, they get one error message wich says it was impossible to start the application due to incorrect configuration.
But this error does not occured in other machines with the same S.O and service pack, and the program showed correctly.
This problem does not occur in the Vista ones that i have tested.

Anyone know why theyre getting this error? and how i can fix it?

Thanks.