I can't purchase anything on the xbox live marketplace or on xbox.com. I have tried to purchase different games and microsoft points but it tells me that the card can't be authorized. I have tried multiple cards which i am sure all work and have the correct information but none of the can be authorized. Everything i am using is based in New York. i am also recieving an error code 8C010003 when I attempt to change payment options on my xbox. I have tried everything on the "can't purchase content" forum but none of it works. Please help.