Robert I have the same problem, when I click on the feature and click on the related tables button it brings up the first popup with the related table and the done button when I select the related table and click done the viewer grays out and hangs the floating grid popup with attributes does not appear. I have checked my rest points and it shows the relationships at the bottom of the page, I have made sure that in the main config the feature class is set to feature, and I even published as a feature service to see if that was the problem and no dice just hangs after clicking done. Any help would be greatly appreciated as your tool is going to be incredibly helpful to our streets supervisor.