I've installed the module for Zencart recently and I am trying to get it to only do payments via Paypal. At this time, that is the only payment module enabled/installed. The order goes through and I see it listed in the zencart admin panel but it never authorizes or processes with paypal.

I know the standalone Zencart's new version has a Paypal Express module. Is there any modifcations that can be done to the Zencart/Xoops version to properly accept Paypal payments?