Sound Object Loop Problem

[Ivan1]

Hi. I'm trying to create a loop with an external file that starts automatically when the SWF is loaded. It works fine in Flash test environment, but no sound plays when the SWF is placed/loaded in the browser. Here's the actions for the first frame of the movie.

myMusic = new Sound();
myMusic.loadSound("sample.mp3");
_root.myMusic.start(0,999);

Please let me know what the problem might be. Thanks.