muvee

I received a dvdrw+ from a younglady that made soemthing for a company party. When I try to open it in RealPLayer I get an error, same with Windows Media. I even tried to open it in muvee 4 which came with my HP laptop (never used it before). Does anyone know whats wrong? Did she not export it as a finished product? She said she watched it and it worked fine.

Thanks