An authorization error could mean several things. First, please be sure that all billing information is correct. Please make sure that your billing address matches your credit card billing address.  Second, be sure to check the expiration date and card verification numbers on your card.

If you are still receiving an error message and you feel that all of the information you are entering is correct, you may wish to contact your bank for further details.  If you are using a debit card it's possible you may need to adjust your credit limit for larger purchases.