Receipt of Goods Line UDF Mapped to Purchase Order Line UDF

I have a checkbox UDF in PO_ReceiptDetail called UDF_LINE_COMPLETED, I have the same UDF within PO_PurchaseOrderDetail. I am trying to map the checkbox from RoG to the purchase order lines. Here is how I have it set up:

This however is not working, what am I doing wrong?

I also have the UDF mapped from PO Receipt Detail to PO Receipt History Detail and to PO Daily Posting Work, I haven't tried adding it to PO Receipt Of Goods Invoice Work yet, but I don't see why I would need to. Any insight?

Sage 100 Advanced ERP 2014 - (Version 5.10.0.1)