Hi, i have just bought a 120gb hardrive from a friend, it's basically new as he hardly ever played his xbox,(and is now selling it this is why he sold me the hardrive). Anyway back to the point, i tried installing army of two the 40th day backup(on verbatim DL+R) to it and it stops at 42% EVERY time, i do not know why as this is the first time the disc has ever been put in my console and it has absolutely no scratches. I cannot install the original game as it is scratched to hell

I installed a halo 3 retail disc to test if the hardrive was working and it installed perfectly. My point is, can anyone tell me why this is happening?
cheers
superscrumpty