I got Radeon9550 and 3dFX emulator (so i can run older games in 3dfx mode without any problem). I downloaded Quake 2 official demo (idsoftware DOT com) and everything works fine - I can chenge rendering mode and the resolution but only in this official demo, i can't change video settings in both ...

I've just downloaded quake2 (over 100 mb)... I dont know why but i cant chage any video settings. resolution and rendering mode can be only "320*200" and "software". OpenGL, 3dfxGL and higher resolutions aint work ;(.
What should i do?