How do I get %TRW_DISP_VW.FIRST_NAME to work in Total Rewards PS 9.2

Per Peoplebooks on Total Rewards, "In addition to images, formatted text and links, you can personalize message content to the employee whose statement is being viewed using database fields. The system delivers these database fields that can be used when composing messages (there is a list of 9 database fields). I am trying to get these to work in our template but haven't had success. I would like to use:

%TRW_DISP_VW.FIRST_NAME (Employee First Name)

Is there something else we need to do to get this to work?

Thanks!