well for me it deos work and sometimes deos'nt but what colour chams u got it should be blue and green or your out of date. umm if your using vista make sure you run as admin on combat arms and cham if this deosnt help well i duno and allso you have to run chams before playing or redownload the chams make sure u dont get the one with changeing the HSheild file chnage name because that's out of date and combat arms wont work
Cheers