Child projects will not open after new window is created in the master

I am using Robohelp 9 (html) to created a Microsoft html file.  I have a master and child project.  My master projected uses a (WebHelp pro) window and the child uses a (HTML Help) Window.   Topics from the child project to open in the main window instead of a new one when there are selected from the table of contents.  I did the following in the master project:

*Set the "Primary Layout " to Microsoft HTML

*Created a new windowy (Window type "HTML Help" which matches the child project

*Deleted the original window

*Renamed the new window to "NewWindow" to match the child project.

Now when I open the master chm file, and select topics from the child project, nothing happens, the topic is not opened in either the master window nor a new one.