Open GL error at start

Trying to run Quake 3 Arena.
Everytime I try to open the game I get a Quake3 error:“Can’t initialize Open GL”
have a PowerMAc G3 desktop with lots of ram,
ATI 128 Rage 3DF accelerator, 6Megs ofVRAM
running OS9. Have downloaded new drivers for my 3d card, downloaded the Quake3patch macbeta1.27 and it still won’t run. Any suggestions are greatly appreciated. Thanks