Forum:DLC Questions

I recently redeemed my code for the Cerberus Network (Xbox 360), and I don't know how to access the free content. I tried to find the stuff on the Game Marketplace, but I am getting an error preventing me from doing such. I also tried looking for the stuff on the Xbox site and Bioware site, but no such luck.

Can anybody help me? (Also, I have no idea if this should be posted in the forum. If not, please tell me.)