Sound Control

I have an external swf files which contains my music for my game. That way it doesn’t mess up my preloader :D. It uses the code like:
_root.startTune = new Sound(this);

And on my fla of my main game, not the fla for the sound, I use a blank mc to load it by _root.soundHolder.loadMovie(“externalSound.swf”). I then use etc to start it playing. The problem I get is when in later frame it wont turn off. I have tried pan, volume, setVolume and stop() but they all effect all the sounds, where I just want to turn off the one rather than all. I heard something about creating emptyMovieClips for each sound but I lost that page and have no clue what to do there.