We've had an issue since rebuilding the store into OSC, where each online CC transaction ends with a "This transaction cannot be processed." message with all CC payments. This message appears after the "Checkout Confirmation" page and loops the user back into their shopping cart.
We ARE able to complete transactions using the Paypal Express checkout, so I know the API information is correct (it's the same for both setups from Paypal). We're using version 1.1 of the PayPal Website Payments Pro (US) Direct Payments contribution and for right now are only able to process CC orders over the phone through Paypal's virtual terminal. Basically bypassing the site altogether.
I've turned back on the ability to pay via CC for purposes of this thread, but we've left this option off the site until now due to this error. We also have a Thawte SSL certificate, but we had these payment issues both before and after the certificate was issued.
Thanks in advance for any possible help on this!
http://www.crawfordperformanceengineering.com
Brett