Turn on/off Bg music

[kwasiada]

Hi guys

I'm using AS2
I have a movie with Bg music playing
I need to silence music when I enter my video section & turn back on when I leave
At the moment it does those things but when I enter another section it adds another instance of Bg music

This initialises the Bg music

onEnterFrame = function() {
bgSound = new Sound(this);
bgSound.attachSound("sound9");
bgSound.start(0, 99);
delete this.onEnterFrame;
}

This turns it off (myPlayer is flv playback component)

myPlayer.onEnterFrame = function(){
	    _root.bgSound.stop();
	delete this.onEnterFrame;
}

This turns it back on (clip event on component)

onClipEvent(unload){
      _root.bgSound.start(0,99);
}

I can't get setVolume to affect the music.
Any help is much appreciated

Peace