I've been using Movie Maker for 2 years and have made a bunch of great videos.  I am trying to make one now and I can add photos and videos to a project, but the preview pane for editing is black.  I get sound for the videos, but can't see a thing.  I tried publishing the movie just to see what would happen but it came out a black screen with audio.  I am using - and have been using - a sony handycam.  Video format is AVCHD.  Again, I have made many movies using input files of this type.  Any suggestions for a fix?  Thanks!