This current gamer profile is not allowed to play on live?

i just bought an xbox live gold membership. but when I try and play COD modern warfare, it says "This current gamer profile is not allowed to play on live" I have no idea why?This current gamer profile is not allowed to play on live?You might of got ban for doing something.This current gamer profile is not allowed to play on live?Parental controls will block certain games. Either you reset it and try again or have your parents take the block off.

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