The registration code is already in use

What I have a problem to login to tryvu MP when it comes to playing BF: BC2V. The installation was successful - I entered the key - accept, everything is as it should be.
Pograł and everything was fine and then I changed my password and there is a problem in the login to the game in order to play MP. Since the first time after activating the game I want to log in, enter your account and password the program asks me to approve the rules and enter the registration code. So rewrite it from the box, and I have two original information comes to me, 'This registration code is already in use'. I'll add to the account on the EA and BF2V I come and see statistics