HTML Help Topic Links Not Working

Hello, We are trying to use XML DITA to output to HTML Help. I can't figure out why when we output the topic links aren't working. The output TOC looks correct, the chapters and topics are showing up, but no content shows. We work in an environment without internet connection. I don't know if this could cause issues or not. I can't find any instructions in the user guides or other posts with this issue. Please help!