[F8] load external swf with sound

I have a site im making, and created the site sounds/music in a seperate swf.

I wanted to know how do I load this into my site in the first frame, and then have it play looped without restarting should someone go back to the first frame? (you know so the sound doesnt play again over whats playing already)

Code:

---

// external movie-
_global.sndtrk = new Sound(this);
sndtrk.attachSound("my_trk");
sndtrk.start(0, 999); // seconds offset, loops

// main movie
function init(){
if(!running){
loadMovieNum("external.swf" 1000);
running = true;
}
};

init();

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very similiar to code i posted to your other thread