I'm attempting to upgrade and everything goes fine, however, when selecting the final "purchase" button, I keep getting sent back to the previous page where info (including CC) is entered. The indicated invalid fields are the CC number and CC expiration date. I use RoboForm, so for the off chance that it was formatted incorrectly I entered the numbers manually...no difference. My default browser is Firefox 4. I also attempted to do it through IE 9 and Chrome 10. All 3 browsers sent me back to the previous page with the same indicated errors. I logged on to my CC account on line and there were no problems with my account.
Is there a problem with your CC verification? Where do I go from here to save the 4$ price increase effective tomorrow?