It's not a bug, this is indeed the reason. You share a cd key with someone who cheated and got banned (pretty common, especially if you're using the nosteam crack). You'll have to either buy the game or get a different cracked key.
You created an admin application for retakes in the cod4: unleashed category? Moved.
Edit: Had an actual read through that mess... Clearly a troll. Declined & locked. Try this again and you're getting banned.
Given some past events we don't currently feel comfortable making you an admin again. Feel free to apply again in the future if you wish to do so, but for the time being we've decided to decline your application.