the selected opengl mode is not supported by your video card

windows-me ; amdk62 550mghz ;320 mbram ; 10 gig hd ;xtasy 5564 nvidia geforce 2 mx/mx 400 agp ; when attempting to play counter-strike i get the message “the selected opengl mode is not supported by your video card” but im pretty sure the geforce 2 mx/mx 400 supports most opengl modes i got the latest drivers from the nvidia website is there something im forgetting? if someone can help i would greatly appreciate it!