Trying to add PO number from Payables Transaction entry to the Detailed Trial Balance for General Ledger

I am trying to add the PO number from the Payable Transaction entry window to the Detailed Trial Balance.   Followed Article ID 863689 (last revised 11/2/13).   It is for an older version (states for Dyn 9, but does include instructions for Dyn 10).    I am currently using Dynamics 2013 Release 2 (version 12.00.2084 (R2)).   I can't find any articles that are newer.   

I can tell that the modified report is printing, since I do get the modified header information; however, the PO number field that gets created does not print anything on the report.

Can anyone help?