I need help with the halo 3 maps?

[Tommy]

Well this is a long story but i got banned from halo 3 a week ago and my friend let me borro his xbox until i got unbanned because he doesnt play halo but i was playin fine for a few days then the day i got unbanned he gave me my xbox back and i went in to play halo but none of my maps would load not the ones on the disk or the ones i downloaded it loaded like this 1...2....3...4....5...6...7...8...29...0... and this repeated 2 times and after that and then it said player failed to load content and i know i have the maps downloaded on my xbox so i went searching for answers on how to fix the prob but i came to a link that told me to get new licenses on the content so i did that step by step and they still didnt load i really need to find a way to get the maps to load i signed onto another account to see if it helped and i didnt and i looked at my disk and there was no scraches on it so now im here and i really need help if you know what caused this please tell me so i can fix it thanks..