My halo 3 disc won't load campaign missions?

My halo 3 disc lets me play in matchmaking slayer and everything but it wont load missions in campaign and it will say disc read error as i finish the first level and the only one that loads. what can i do to repair that or how can i make it work?

My halo 3 disc won't load campaign missions?
i had that problem. there were some technical difficulties in some of the halo 3's so i had to go back to the store i bought it from and replace it (for free).
Reply:Maybe laser intensity was too strong for this disc. I increase resistance from 3.4k to 4.1k . It work fine . No dirty disc issue, just dvd reader (I think!) If too much resistance , above 4.7k it can not read any other game at all . Hope it help. Report It

Reply:hmmm get a disc cleaner. and if that doesnt work take it to a eb games or local game store and explain to problem to them. if they cant fix it take the game back and get a new one.IF THAT doesnt work and it still does it with a new disc then its maybe your hard drive being weird.you could call microsoft and complain and see if you can get yourself a new 360. hey worth a shot!
Reply:try one of those cd cleaner kits, check for cuts or marks, the inner part of the disk is for loading, if you have a cut it may be in a specific part that loads the campaign