TOC, Index, Search not displaying in Internet Explorer

This issue is in Robohelp 10, with a project that uses merged projects with a WebHelp output. This project was just upgraded from Robohelp 7 to Robohelp 10; prior to the upgrade, there were no issues with display in the published help. The project is based in a network folder and the webhelp is published to a different network folder. No settings or file locations were changed during the upgrade. When I completed the upgrade, generated and published all merged projects and then generated and published the master project, then attempted to open the complete webhelp from the index .htm file from its network folder, the TOC does not display and the Index and Search functions don't work in Internet Explorer, but all of the above works fine in Firefox. The project is not checked into Source Control. Any insight as to what I can do to correct this is appreciated.