Im trying to open a project with windows live movie maker but every time i try and open it I get this message- 

Sorry, Windows Movie Maker can’t open this product file. The file may not be compatible with Windows Live Movie Maker or be corrupted. Please select a different project file.

This only happens with one file that i have been working on for the last month, all my other projects open without a problem. I spent many hours on this project and would like to know if there is any way to save it. 

.wmlp is the files extension