Cod 5 account problems!!!!

i just downloaded a cracked online multiplayer. when i get on, it tells me i need to make an account to play... well i make an account and then hit ok and it comes up again. i hit cancle go to slect profile and click create new. and it says it cant do it. can anyone please help?

there is only one solution, buy a legit serial number.

not's the serial u must choose other name cuz another player is using this username

It's because another person online is using your (cracked) serial key. In other words; actually buy the game or your f*cked.