PO cXML Customization: New Tag

Hi Experts,

I want to add a new tag in the Purchase Order cXML to carry Procurement Card information. I successfully edited the Purchase Order Data Model and can output the data on the Purchase Order PDF, but I am not having luck with the cXMl.

I titled the new tag "PCard" and would like to know if the addition is possible:

Am I using incorrect syntax? Should the new tag be moved to another section of the XSL file? I attached the XSL file (could not attach XSL to this post, so the file is txt). Rows 1364-1366 are where I made the edits.