Due Date on historical PM transactions

I've created a SmartList that lists payment numbers and the invoices that the payment is applied to as well as vendor invoice information (amount, invoice number, etc.). I can't seem to find the due date though. I'd like to pull in the due date, so we can see how many days from the due date we actually paid a vendor invoice. I'm using tables:

PM Paid Transaction History File (PM30200)

PM Vendor Master File (PM00200)

PM Apply To History File (PM30300)

There is a due date field available in the PM Paid Transaction History File but it shows 1/1/1900 for all records. Any suggestions?

Thanks,

Sharon