I´ve allready received my key but it now says it's the wrong key or name. What now?

same here. Also sent the email just now

I've just purchased and downloaded Commander Europe at war. But whenever I start the game, it asks me for a name and key. It says the e-mail I've received with the order information has everything I need. But I can't seem to find it. And so, the game is still only a demo and not the full game. Where...