How do you display form field data on a confirmation landing page?

I set up a field merge to pull from a custom object, which is updated when a user submits a form. I put the field merge into the confirmation landing page that I am showing after the form is submitted. This field merge is not displaying the data from the selected form's field. To verify that the field merge is working, I put it into an email that is send to the submitter. The field merge works perfectly in the email. Why doesn't it work within the landing page?

Has anyone tried to show form data that is submitted on the confirmation page so the submitter can see the data they submitted?