Program works with some Win OS..not all...why?

Hi,
This pertains to the family of Windows Operating Systems. I recently wrote a program in C++ using Dev-C IDE and Mingw compiler. The program used OpenGL and GLUT. It compiled fine. I had only one reference to a bitmap header in windows.h for bitmap loading..but no other win files.

It ran on Win95, Win98 and WinME consistently (several platforms). It ran on some Win2Ks, but not all. XP could not run it at all on many different PCs.

Now, this used OpenGL (v1.2...I think). I included the glut.dll with the software. I wrote an event logger that would record all events during program load. I found that the program would fail at various points during load. It managed to get farther some times than others.

I am curious what ideas you have pertaining to problems related to this issue. Have you written programs that don't work on XP but does fine on others? Please let me know what you think.

Regards,
ChuckB

Maybe incompatible OpenGL versions. Can you give examples of exactly when the app failed?