Umm Help with voodoo3 OPEN GL and only open gl

I have a really big problem with my dam Mini driver on opengl. First off, for example if I play a first shooter game with open gl, and in the next 4 min I get kicked back into windows??? this only happens in open gl. So i have to use defualt driver and i get VERY VERY low fps. wich makes it unplayable. Any help would be nice???

p3 800

icq: 87264680