> I have a fresh installation for X-cart 4.6.5 and X-Payment 2.11, both residing on the same VPS.
Please note that X-Payments must be installed separately in order to be PCI compliant. See full PCI DSS guide for X-Cart at http://help.x-cart.com/index.php?title=X-Cart_Payments:PCI_DSS_implementation_guide
With regards to the issues you posted - this needs to be investigated at your server. I suggest you to contact our techs using your HelpDesk account.