controlling timeline sound with sound object

[ShadyCat]

I want to add sound controls on my presentation like this one http://www.kirupa.com/developer/mx/volume_slider.htm

I only add

allSound=new Sound();
allSound.setVolume(0);

to controll all sounds on the timeline, not only a specific file, but it causes stop/play button doesn't work correctly.
When I click on 'stop' the 'play' button and the slide never work again

please tell me what I do wrong?

[ShadyCat]

Now that I have more timeline sound I found this stop/start sound don't work for me. Now that I have the following main code

onClipEvent (load) {
	allSound=new Sound();
	allSound.setVolume(0);
	_root.volume = 70;
}
onClipEvent (enterFrame) {
	allSound.setVolume(_root.volume);
}

and code for the slider

this.ratio = 0;
dragger.onPress = function() {
this.startDrag(true, 0, 0, line._width, 0);
    this.onEnterFrame = function() {
        ratio = Math.round(this._x*100/line._width);
       _root.volume = ratio;
    };
 };
dragger.onRelease = dragger.onreleaseOutside=stopDrag;

I decided to set stop/play buttons to controll the volume like this

on (release) {
	_root.mySlider.dragger._x = 0;
	gotoAndStop(2);
}

for stop
and respectively

on (release) {
	_root.mySlider.dragger._x = 50;
	gotoAndStop(1);
}

for play.

Now it works just fine, except one problem:
When the movie loads, you have to click on the slider first, to make the buttons work.

Please help on this, I'm really a newbie on this, and I'm not sure what should I do now!?!

10x