I finished a show with movie makers which contains pictures and movies.  Everything works fine until I add music to the show. Once I add music the movie parts show nothing and the music doesn't play.   

Detail:

Everything started once I tried to save the project as a movie.  It gave an error and closed the program. Everything failed after that although the last saved project was working music and all. 

Process I followed:   I opened the project again and deleted all music.  I saved the project and re opened.  Once I did this all pictures, effects and movies worked fine. But when I add music again, then the music doesn't play and the movies go blank.

What's interesting is that if I add the music at the very end of the show it plays fine. But once I add music at the beginning , the music at the end dissapears. It seems that it is pushed out into lala land and the show fails again.  I believe there may be some markers somewhere that go beyond the end of the show which are causing the problem, But I don't know how to analyze this.