MS HTML TOC displays, why not content?

I'm using RH 11, and some of our programmers have decided that they want me to produce CHMs for their programs rather than WebHelp.  When I generate MS HTML Help, I get the TOC and Index in the Help just fine, but none of the content displays.  This is true of any MS HTML Help I generate, so I know it's some mistake or setting I'm missing.

Any clues?

Thank you!