LE specialization code not working

A few days ago I put in my code for the specializations that came with the Limited Edition of Halo 4 and it didn’t work. The guys at game stop said I should go and look for a corrupted file and re download it. That didn’t work. Today I called Xbox customer support he had me look at my hard drive look and see if I had a file called Specialization Priority Alpha and I didn’t, but when I checked my download history it was there with everything else.I re downloaded it again and checked in game if it was there and it still wasn’t. Please help, I have no clue what I am doing.

you aint getting no help here buddy!! been posting like crazy asking about these code issues!! apparently 343 wont bother checking!!