I just completed my implementation of Payments in the game, and tested it twice and it worked. But since then, whenever I try to make a payment (I click on the Buy Credits button in my game), I get Yahoo's "buy" dialog, which presents me with the different payment methods. When I choose any payment method (e.g. PayPal) and click on "Pay Now", I get this error message in a dialog box:
Error
We're sorry, your purchase could not be completed. You will not be charged for this transaction. Please try again later or contact us for assistance at Billing
Is there something wrong with Yahoo Payments at the moment?