After reinstalling BC2, I try to login to multiplayer. Unfortunately I have forgotten my password. After changing to a new password on the EA site, I make an attempt to log in again, then it asks for my cdkey. When I enter it says "sorry, already in use". How can I log back in without opening a new account or dealing with the cdkey issue?
Contact EA and convince them that you have a legal copy and have forgotten your password, we can't help you with that.