trying to change my ea account on my xbox live

[toxicpain08]

my brother let me use his ea account so i can play battlefield BC2 but now im trying to use my own ea/origin account but idk how to do it. my brother doesnt remember his password but i have his account name i tryed changeing the password but i cant on aol so idk what to do ive been on ea.com origin xbox.com battlelog and nothing give me a chance to change accounts id really like to use my own account for my games so if anyone knows how to change plz let me know

[err0rl0ading]

i guess ea does not allow that option as i have been trying to do it for weeks, even with there help still wont let me.