Could you please provide us a few more details about your issue? Do you have trouble with the Online Pass? Please keep in mind that the Online Pass is for free now and that you can download it for free from your XBL/PSN store. You are not able to redeem DLC codes a second time but should be able to get the content for free from the store as long as you are logged in with the same Gamertag/PSN ID account you used before.
Cheers
Basti
