Placeholder problem

Hi all,

I have a report that is showing Purchase Order header and line records. 

I am trying to change the legal disclaimer at the bottom of the PO based on the Purchase Order Type that I am retrieving from the database in the headers section of the report.

To do this I setup a Formula column called :CF_PO_TYPE in the headers group that populates a Placeholder column called :CP_LEGAL using the following logic ;

If poh_po_type = 'INV'

then :CP_LEGAL := 'INV'

end if;

If poh_po_type = 'ARCH'

then :CP_LEGAL := 'ARCH'

end if;

If poh_po_type = 'US'