Be honest, did you pirate the game? If you did, shame on you...and it's an easy fix, just do some research. But I'm not accusing you of anything, try to reinstall and if you still have problems with you legit game then go to the activision forums for help.
I\\\'m a perfectonist - SilentShiro I don't that it is really for to try that hard to type with English but I am not of that. - gandob