setVolume problem

I am using a simple onEnterFrame function and decrementing the value of a variable named myVolume. When myVolume reaches 0, an action occurs. The action occurs, so the condition if(myVolume == 0) must be satisfied, and yet, although the volume of the background music has indeed lowered substatntially, if I turn up my computer’s speakers I still hear the music playing (just at a lower level).

I have checked to make sure the track is not playing anywhere outside of the flash app.

If a sound object’s volume is set to 0, shouldn’t the sound be completely off?

Thanks.