a solution to unloadable content on matchmaking

have a clean disc with barley any damage done to it ond not able to load maps from the sweet halo game of yours
here is a solution go to the dashboard go to the my xbox tab scroll all the way to the right to your settings
go down to memory go to the storage device you use most on halo reach press the (Y) button on your controler to open up device options and click clear system cache it will clear recent data small things like what causes lag on the dashboard
the only thing that will happen is that you will have to update your games again before you play them
But i asure you will be able to play your maps