full screen

I own an Geforce2 video card and I tried to run NeHe’s tutorials(nehe.gamedev.net).
When I ran’em in a window all was ok, but when I ran’em full screen the figures was rotating too slow and the colors was changed.
Could someone tell me why?
I’ll appreciate any help.

Make sure, the fullscreen mode uses the same amount of bits per pixel (bpp) in the fullscreen mode. If you set your resolution too high, your system may not be fast enough to rotate as fast as in the windowed mode.

I checked and the bpp rate is the same in full screen as in windowed mode.

Sometimes running an app in 32-bit(windows display setting) instead of 24 makes a significant difference.