Can't change between themes

As a devotee of EasyBlog, am trying EasySocial and EasyDiscuss. With EasySocial, the selection of themes is limited to just two. When I toggle back and forth between them in the control panel, the front end doesn't change. It's still stuck in "wireframe." I hope to get your help with fixing this because I'm going to have to pick a theme and then hack it to get close to the nice green theme I'm using for EasyBlog. And the same will have to be done for EasyDiscuss, I imagine.
Thanks,
-Jim Gribble