Hello, I have a certain issue with my xbox 360. Yesturday i attempted to buy borderlands off the xbox marketplace. It said my card was expired and i needed to add another. I added my amex to the xbox. When i attempted to purchase it again it said "Cannot authorize payment option, try again or a different payment option" i called microsoft support and they could not understand the problem either, they told me to call the bank. I called chase bank and there was nothing wrong with my card with paying for xbox or any other things. I decided id wait a day to see if it was just a glitch. Today the same problem is happening, and for some reason my xbox is having troubles loading the marketplace aswell. Is this a common issue, and if anyone has seen this error before... do you know how to fix it?