I'm running the trial version of the Payment Reg Pro, 4.34 and I also have the Billing Manager Trial 2.50 setup on a site running DNN 6.1.3.  I created an invoice in Billing Manger and I emailed the invoice to my test user.  I clicked on the link at the bottom of the invoice to pay for the invoice and I was taken to the page where the Payment Reg module is, as expected.  When the page loaded, the data from the invoice wasn't present in the Reg module.  Shouldn't the invoice amount be populated since it's passing the invoice ID to the module? I don't have any other products or services setup for the Payment module, as all the invoices that I'll be generating, the line items will be manually entered.  Is there a step that I'm missing or a bug in the module?  I couldn't pay the invoice becasue the Payment Reg module has a price of $0 but the invoice I wanted to pay was $87.