tmt0009

Hello, I have played through the entire campaign once before and now it says things like "player failed to load content" for the Forerunner mission (all checkpoints). i don't do Xbox Live. I traveled recently and I noticed earlier today that my disc has a scratch towards the outside edge of it (it doesn't go all the way around the disc). Now I can't play the Dawn mission at all (won't even attempt to load). When I play the missions previous to Dawn and Forerunner (Prologue and Requiem) it sends me back to the main menu once they're finished. I know the Dawn problem is definitely the scratch but the Forerunner problem is aggravating. Any help? Thanks Trav