How to enable DFF on the Buyer OAF page

Hi,

We are upgrading from 11i(11.5.10.2) to R12(12.2.10) version and we want to enable the DFF on the buyer oaf page also. We set rendered = true for buyer DFF column in OAF personalization but cannot see the DFF on page.

We need to setup a reference flex map also on the OAF page and we did it but we are not sure what value we need to give in reference field. This reference field value should be mapped with the reference field selected while defining the DFF in oracle system administrator.

DFF name : Purchasing Agents

Reference Field : :$PROFILES$.JGZZ_COUNTRY_CODE