There should be a control that looks like a small book there. Clicking the pages of this "book" move you forward and back through the records in your current found set.
Not a user of current Mac systems, but you could try trashing FileMaker 9 preferences or you can re-install FileMaker 9.
Thanks everyone, this issue is resolved, you need to install QuickTime updates on your Mac so that this book icon/graphic shows up and works properly. I was installing a Tiger OS X 10.4.11 update, then I needed to run the software updates.