There is a glitch in our registration forms and no one seems to know how to fix it. When submitting your credit card to pay, an error message pops up immediately saying your card has been denied. The workaround is to keep trying. Your credit card is probably just fine. Close the error and click submit again. Repeat until it works. It might take 3 tries, it might take 10. I wish I could offer more but at least you won't have to re-enter the card number every time.