A find in a portal yields no results
I have a simple contact database with 2 tables: Contacts and phone_numbers. These are joined by contact ID. The phone numbers appear in the contact layout within a portal that contains two fields: type & number (e.g. "Work Phone" & "555-1234". I've set the field behavior to allow data entry in find mode, but when I try a find of "Work Phone" in type field in the portal, it says "No records match this find criteria". Is there a setting I'm missing? This is supposed to work, right? I've double checked and there are indeed contact records that have a portal row that contains "Work Phone". The portal works correctly otherwise, displaying the info as it should. This same problem extends to other portals in my database, I cannot perform a find in any of them. Any ideas?