Theater mode Problem

My game is not allowing me to access theater mode, It is telling me “One or more players do not have an xbox 360 hard drive. An xbox 360 hard drive is required in order to watch a film.” The funny thing is im playing from my hard drive not my memory stick. Any thoughts?

Strange try turning off your xbox and removing the hard drive and giving it an wipe then reinsert it. Do not dampen or wet it for obvious reasons.