Firefox scaling Flash movie incorrectly

I have followed all the advice on getting a Flash movie to scale correctly in Firefox. I have put the following into my HTML file:

body,html {

But this doesn’t seem to do the trick. Firefox still displays only the top 1/3 of the movie.

Putting the movie in a table and centering it does not work either. This only seems to be a problem on Flash movies that are set at (Top Left) “TL” alignment.
What else can I do?