Hi Kevin!
Just to make sure, are you using free Pay with Amazon module (
http://www.x-cart.com/extensions/addons/pay-with-amazon-payment-module.html) or did you create your own payment method?
If you are not sure about how to create payment method module, please refer to our previous webinar record here:
http://kb.x-cart.com/display/XDD/Webinar+3+-+21+Aug+2014+-+Payment+gateway+creation
Tony.