Go to the evenbalance site and click the Battlefield Game, then theres a part close to the top that says "NOTICE: PunkBuster is designed to auto-update itself during gameplay. PBSetup is the easiest method of manually updating PunkBuster for most users (players and admins)." and the PBSetup is a link, dl that and add BC2 to the list, and hit update...That should work. Worked for me...