my halo 3 is giving me a weired message?

[Garrett]

this only happens in the campaign,the multiplayer still works.I recently learned how to drive the anti-air wraiths witch normally blows up if you kill the brute in it, so i tried to go to the campaign and all the levels would load to 27% and then say "players failed to lode content" can i fix it or do i need a new game or a new xbox360

and if you dont know how to use get in you need to beet the door open, hit him in the head once to nock his helmet off, then find a spot were the game dose not say "hold RB to bord wraith" hold RB and shoot him in the head and you should clim in immediately.

 

[Tyler]

Well first id call the store you got it from and see what they say, if they wont give you a new one id go to Walmart and buy a cleaning and reparing cd cleaner. i have one it cost me like 20 bucks but its saved me probably over a hundred on movies and my ps3 games instead of buying new onres so go out and get a a cd cleaner and save some money