Crump

Hey, I recently bought this game from Steam (today, to be exact :P) and when I try to launch it up and install that anti-cheat thing (Bullseye I think) it comes up with the error message: "addons/character2.pbo" I'm reinstalling at this very moment but could someone tell me if I have to patch it up, and where to download it from? Or maybe any solutions, I have Operation Arrowhead installed from a CD, and I really want to play some Arma 2. Thanks all for reading and hope you can help :D