Hi, I am able to prepare my movie and it plays back fine but when I try to render it as a movie the first file in the sequence blanks out (small yellow triangle with !). Error say there are missing or unusable files.  the files are Windows media audio/video which I have previously converted from AVI files as movie maker won't read AVI. Using windows 7. I have read some posts and have  'repaired' the movie maker prg in response but still the same problem.  Hope someone can help,

Brian