Yes, I tried 3x times with the CC numbers and code from the back. I used it last night to make a purchase also and it works. No idea why it won't go through.
Guess I will just take my midsize with the Continental discount.
My DH could not sign up using his vis cc from his credit union. For some reason, it comes up as a debit card, even though it clearly is a visa credit card. This happened on the alamo site with quick silver as well. He was able to use our disney visa card for both sites though.