AS2 Flash Sounds MUTE on page navigate HTML

Hi, I have just done couple of banners for Dettol with BG sound, now the client wants the sound to be stopped when he navigates away to a different web page

The issue is
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[]Mouse-over the banner and press alt-tab. The music keeps playing and you can’t stop it!
[
]Without mouse-over (music is playing at this point), press alt-tab and go to another application. Press alt-tab and come back to the browser and the music starts playing, even though the mouse is not over the animation
[/LIST]
for reference [FONT=arial][SIZE=3][COLOR=#0000ff]http://equityme.com/demo/dettol/

[/COLOR][/SIZE][/FONT]source file [FONT=arial][SIZE=3][COLOR=#0000ff]http://equityme.com/demo/dettol/300x250.zip

[/COLOR][/SIZE][/FONT]Please help.