BAD opengl

Well i thought i had fixed the problem with my OPENgl but it seems it has returned. The problem is i play TFC an online game and i play in opengl video mode. I have a geforec2 mx200 64mb on windows xp professional. And all the sudden i go to play and it says my video card doesnt support the current opengl setting. It happened the day before too and i reinstall tfc and the video card and it worked (that means the current drivers). But now again when i restarted my computer and went to play it did it again. So i am just wondering what could be causing it. Any ideas or anyone that knows the problem plz respond.