BAdI HRPAD00INFTYUI for updating iView on ESS with customer fields infotype

I am working with an ABAPer on the BAdI above. We are trying to make a few customer Z* fields avaialble on ESS for IT0021. We followed the document posted at

https://www.sdn.sap.com/irj/scn/wikipath=/display/profile/ESSPersonalInformationUIenhancementwithoutmodification

I managed to make the fields visible on the iview as per instructions (I don't know much about portals) but when I enter data in the fields on ESS and press Review button the custom fields no longer show. In addition, the data record does not save the information entered in these custom fields.

Any input is appreciated.

Thanks,

Nicoleta