Thanks, stokerg, I appreciate the help. I had already tried that, and I've been pulling my hair out for some time trying to figure out what's going on, so I'll just describe what I'm experiencing, and what I think is happening.
I put the TOC on the master page
On the first set of facing pages, the TOC shows up perfectly
On all subsequent pages, the TOC displays the "No table of contents entries found"
I think the problem is because I have my text boxes in the Master Page, linked together. That way I don't need to insert two new text boxes every time I add a spread of pages.
On, say, pages 5-8 when I link the text box on page 6 to the next spread with Master boxes on pages 7-8, it registers a change from the Master Pages, and no longer displays the TOC?