After editing movies in Movie Maker, saving to my Computer, importing into my Expression 4 Web page, saving, the movie does not play, even after previewing it via Internet Explorer.

The movie plays on my computer Ok. Also the movies that have not been edited, and are imported into Expression Web page DO work Ok. It is only the movies that have been edited on Movie Maker. Both are .wma files, both are movie maker files. It appears something goes wrong after editing...

Any ideas?.....Thanks