i had same problem, seems a lot of ppl do. It didnt want to accept credit card.
I got it working by adding money to paypal, and buying crysta through ultimatepay, with that...quite the hassle.
The option for UltimatePay is still there...so it should work? but i think using CC didnt work for me either, which is why i had to add money to paypal account, to get it to work.