[jasonjaques]

Hi Ambal,
There is a bug with the iFrame integration with X-Payments lite on the OPC interface. I am just narrowing it down for you with some details / screenshots and will lodge it properly in the issue tracker.
If you install a fresh clean copy of X-Cart 4.5.5 with X-Payments 1.0.6 and setup and configure and setup with both x-payments and the x-payments-connetor lite on OPC, it will not load the iFrame on the OPC checkout page. It loads it incorrectly on the next page with no submit button (as per LuxiMedia pic above)

If you then enable shipping tick enable Realtime shipping modules for the first time, It then will seem to load correctly in its iFrame on the OPC and you can complete the order on the One Page.

It is something to do with the shipping secton / realtime shipping section not being enabled for the first time is what i have found anyway to get it working from a clean fresh install. And then it goes fine.

Regards
Jase
X-Cart 4.55 (Testing)
X-Payments 1.06
X-Mobile 1.3.1 (Testing)