WarrKC

I bought reach as a part of an xbox package over christmas and the Reach game was download only I have no disc and is only on my hard drive. I am only trying to play myself no other party members. I will try to redownloading and see if that helps.

I recently purchased and downloaded the anniversary map pack from xbox live. When I go to play on those maps from Reach it tells me that one or more players do not have the maps required to play in this playlist. I am the only one on the system when I get this message. What am I doing wrong?