Alex, we made some cosmetic changes to our website over the weekend - color scheme. However, no modifications to the cart (unless changing the color from peach to white is a modification).
On 10/31/2013 we changed the usage status on our X-Payments license from "Under construction" to "Live" (not sure why this was never changed). But since that time we've had successful credit card transactions.
A few weeks ago we did a patch to upgrade from PHP 5.2 to PHP 5.3, but we've had successful credit card transactions since then.
Is there an error log where we can identify the specific problem? The email was very generic. We logged into X-Payments but nothing jumped out at us.
Originally Posted by ambal
Have you changed anything in your X-Cart store (i.e. modifications, upgrades, changed configuration, etc.)? Such sudden changes do not happen without someone doing something somewhere.