Bob, I did as you suggested: I cancelled my reg then re-entered. This time selecting "credit card" sent me to PayPal, and I successfully sent the funds. So, this time it worked... (shrug)

On edit: I just re-reviewed the email confirmation I received after yesterday's reg; it states that I had selected "check" and not "credit card". I swear I had selected "credit card" (really!) but, there you are... sorry for the trouble. - GA