UnitPrice won't display in PO Suggestion Entry

When access Purchase Order Suggestion Entry from the Buyer Workbench, and click on Material List tab, the column UnitPrice shows 0 (zero) regardless that exist pricing from prior POs. This was working fine when we were in patch 11, but after updating to patch 16 stopped working. We checked for hidden fields in Personalization, but we couldn’t find any other field that shows the price.

Any ideas?