MW3 - Can't play online

A friend of mine gave me a 48-hour trial code and I redeemed it on my XBOX console. I tried playing online (multiplayer) but it said 'This account is not allowed to play on XBOX live'. What should I do? I'm pretty sure the 48-hour code is working.

 

Restart the xbox...? lol.

 

If you're getting a unable to connect to xbox live or MW3, it's the trial you were given, try entering it in again.

 

Do you really think I haven't tried that? Thanks for trying to help anyway.

Alright, I'll try to do that and I'll keep you updated.

EDIT: Lilly, I tried entering the trial code again, it said 'this code has already been used'.
EDIT 2: I tried asking other people for help, some of them said 48-hour codes don't work anymore. Is that true?

 

Bump!

 

Problem fixed. Can be closed now.