Problem with compiling project after using comercial version

[as001622]

Hello!
I've started create my project using comercial version. After trial period I changed it to open source edition. Now I can't compile my project. It seems that something keeps my project at the last evaluation day level. and i can't do nothing with that. If I'm trying change something it work in the same way like it was. I've tryed add some mistakes, but my compiler (Visual 2003) even doesn't show that my project is out of date. Could anyone help me, please))
Thanks!

[wysota]

Delete the .vcproj file and regenerate it using qmake -tp vc from the open source version.