i just installed tremulous on my new computer I'm running windows vista home basic with a nvidia geforce 6150SE nforce 430 graphic card the problem is i cant change my screen brightness in game Ive tried using options screen brightness and /r_gamma in game and it say set device Gama ramp failed also my text in game is being cut off as if the game thinks my screen is larger then what it is I've tried switching video mode which work until i close out tremulous and restart it then its back to the same problem