Volume control tutorial

hi everyone,
i used this tutorial:
http://www.kirupa.com/developer/mx/volume_slider.htm
and created a nice looking and workable slider.

the problem now is, that i dont want to hit play and drag
the slider for the music to start. is there a way to make
the slider sit at 50% and the music start playing when its done
loading?
i tried messing around with the script, but cant make it work.
any help and suggestions welcome.
thanx in advance.