Progressive Download/Flash MX2004

I decided to use the mechanisim “Progressive Download” on my web site, so i imported to flash and then exported as a mymovie.flv, and i noticed that it was a big compression, and lost of quality resolution. So when i download it on my site looks pretty bad!! what can i do?
By the way the site i’m working on is and the video is under productos/frenzy/comerciales