Whenever I've tried to join a MP game lately...I get a message that says my serial number is invalid. Is that my CD key? If it is...then why is it invalid if I bought it at Best Buy??
Could be that someone has a copy of ur cd key and has used it to register thier game. Thus stealing it. So whenever they are logged on, you cant. And vice a versa.
So...then what do I do??
If you were me, I would e-mail the command and conquer people.. I have had this problem before with a sims online game. They were able to delete the person who had regestered my game. Then I could get on.
But, you should not have this problem if you bought the game @ Best Buy. I had this problem buying a game off e-bay. The person who owned it before me had played it.