Hi! I have just tried to register an iTunes account, I put my apple Id, my credit card and billing info and then when I click continue this message "Please enter your Apple ID and password, then click Billing Info and update your payment information. If you cancel you may not be able to buy music until this billing issue has been resolved" keeps showing up no matter how many times I re-enter the information. What can I do? I don't understand the problem exactly, I think I did everything right!