How to change my xbox live account age?

when i first got xbox live i made my age 14 cause that'ss how old i was. so when i started gettingg addicted to call of duty 4 and 5 all my freinds have the map packs except me. i would buy them but i cant. i have tried to change my family settings and everything and it hasnt worked.. can someone help me.. or add me on xbox live and tell me... kballer3. thanks.How to change my xbox live account age?you can do edit personal info i think. try itHow to change my xbox live account age?U have to change it on your windows live account. Go onto like hotmail.com and change it from there. This should automatically change it on ur xbox live account.