[Zope] Open the "index.htm" file in a folder

I am trying to setup navigation on my site. I want to open a default page when you go into a subfolder (like a default or index.htm). When I try this, it just shows the DocRoot file. Example: root index.htm | | |------------- | | | SubFolder1 | index.htm | | |------------- | SubFolder2 index.htm |------------- | SubSubFolder1 index.htm When I go to SubFolder1 or SubSubFolder1 I go back to the root index.htm. Why is it doing this rather than opening the index.htm? Thanks -Allen