Originally Posted by vasilis
Now I am getting the following message in X-Payments Connector configuration page:
Failed to meet environment requirements
X-Payments Connector callback script https://<new server IP address>/shop/payment/cc_xpc.php is not reachable by X-Payments (check X-Cart logs for details). Your checkout will not work untill you make it accessible by X-Payments. See Troubleshooting for more information. Once you've fixed this issue click here to perform check again.
I have seen this recently. I believe it should clear up once you set the x-cart store to use HTTPS on checkout and payment pages and have an SSL Certificate installed.