Comment 15 for bug 655198

a t:
The error in your first debug log is fixed in the binary attached in comment #8.
Your second debug log is about a missing image module for svg graphics (which is usally included in the gtk# installer though).
Please use the binary of comment #8, deinstall gtk# and try the updated installer from here: http://ftp.novell.com/pub/mono/gtk-sharp/gtk-sharp-2.12.10.win32.msi

Rus F Adrian:
Your debug output says "System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt".
I'm afraid there's something wrong with your setup or your hardware. The fact that the app runs on your other xp machine also indicates that. Please try the new installer I suggested to a t. If this won't fix it either please try to reinstall the .net framework.