Recently downloaded via marketplace DLC 1 for 1st time, but when I try to play with a friend a private match of Survival or Mission, I cant start it up nor my friend when he's hosting.
Now, something happen that my rank was reset (Spec Ops) before getting the DLC, so I need to unlock some of the old maps, is it because of this that I cant play the new maps? that Im just a Sgt.?.
Any suggestion is welcome.