Dead Space 3 Limited Edition Online Pass doesn't work

I can't play on Coop-mode.

I buy Dead Space 3 Limited Edition a few days ago, y try to activate the online pass but I got trouble, It send me to the store to download the pass but it show a "don't allowed" sign, so I can't get the online pass. I turn off my xbox, erase some things (two accounts of friends I have there) and try it again.

It accept the pass and I play with a friend that day with no problems, but then I try to play yesterday and it shows me the same problem (don't allowed sign on the store), I try to put again my code but it doesn't work and it say that the code has been already used.

The game is new, it was sealed, I just buy it a few days ago. What can I do? How can I get a new pass?