I had the exact same issue duckman when I just ordered. System would not take my credit card info, I tried 3 times and hung up at authorize window as well. Then tried PayPal option and it worked fine with immediate confirmation. Different cards from manual entry to PayPal, not sure if the issue was that or just a system issue with authorizing cards entered manually.

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1