What hack do you use? Try using this http://www.mpgh.net/forum/164-combat...1-11-10-a.html
What OS is your computer? ( XP, Vista, Win 7 )
What injecter do you use?
If you are using Vista/Win7 "right click run as admin" for the injector.
Make sure you press the inject button as soon as hackshield pops-up
Or get PerX its an injector that auto-injects. Use the search button to find it.
Some hacks arn't working for XP i think, I've been reading it somewhere. Ohh, the hack i linked you won't work with XP.