Hi Lisa
I'd look in the following places:
1. Click View > Pods > Project Setup
2. Expand the Windows pseudo folder
3. Double-click the existing window
4. See what the setting is for "Auto-synchronize TOC" (It's
in the lower left area) You want it checked.
Now look here...
1. Click View > Pods > Single Source Layouts
2. Right-click the Microsoft HTML Help layout and examine
properties
3. Click the Edit button to the right of Advanced Settings
4. Click the TOC Styles tab
5. Is there a check mark next to "Always Show Selection"? If
not, place one there.
Recompile and test.
Cheers... Rick