Please Help!

I have a couple of Main Categories that have sub Categories. I used to be able to click on a Main Category (which doesn't have any products) and see the products from all the sub Categories. Now when I click on the Main Category, I get a blank page. Here is an example:

http://www.selecttacklecompany.com/lures/bass

This URL *should* list all the products from the sub Categories below the "Bass" Main Category.

I have tried seemingly every permutation of admin setting. Any help would be much appreciated.

Thanks,
Charles