why does powerpoint (2010) crash when starting a scene?

I just signed up for a 15 day trial of your software. I want to be able to add a scene to a presentation in Powerpoint 2010. I installed the add-in, I created a scene (preview works fine), then added the scene to a slide using the wizard. Everything seemed to work fine until I try to view the slides; when I get to the slide with the scene Powerpoint crashes. Any ideas?