How can you change your age on xbox live plleez answer says i need to be older to play madden 08 on Xbox live!?

im 12 i need to change my age pleeeez help!!!!!!!!!!!!!!!!!!!!!!!!!How can you change your age on xbox live plleez answer says i need to be older to play madden 08 on Xbox live!?you could just make a new acc and tell all your friends to friend invite it

games

know why a teenage girl