[WIZARDCAT]

the title says it, whenever i launch up halo reach, it gets past the first loading screen, then when it gets to the part where the first cut scene when you play it (with the asteroids and stuff) it gets green screen when that should be playing, but if you wait about 10-20 seconds you can skip it, so it brings you to the title menu as usual, but then i find that all my maps are missing, even the default maps that come with the game, and the campaign missions and so on.... i love halo reach but am now unable top play it, any suggestions, i was thinking of getting a new disc but i don't know weather its the disc that's the problem or not, help me please