OpenGl-WinXP (Plz help)

I’m using an NVIDIA GeForce2 MX 200 (HP) with Windows XP.
I’ve tried downloading the Detonator driver for Opengl, but it doesn’t seem to work.
Whenever I play Counter-Strike and turn on OpenGL in 800x600 (Also tried 640x480) mode, I enter a server and it kicks me out saying that OpenGL is not supported.
Any suggestions?