- last post: 01.01.0001 12:00 AM PDT
Since you have a 360, I had the same problem. Make sure you update if they ask you to when you put in Halo 2. Then after the update, go directly to download content after you have signed in and before you go into MM. It will ask you to sign in again and this time you will be by the downloadable maps. The maps should be free.
If this is not the case, you might not have enough memory on your hardrive