We have enabled it in PayPal. Our upgrades are set up inside xF correctly. It will work for a few days/week, and then PayPal turns it off. We keep getting this email: What do I need to do to resolve this permanently? There MUST be another place I need to set something up on xF/server, but I have no idea what/where, and I can't find any reference to it in the general help/setup info.