Making MP3 player play next track automatically

Heres my site so you can see what I mean…
http://www.afterthesmoke.com

On the first page, my player begins to play like a radio show. i have different sections which are all individual tracks. the player works and plays each track when i manually press next or previous…but it doesn’t automatically play through all the tracks. instead it pauses after the first track and i have to manually press next.

here is what i used…can you find the problem please:

stop();
playlist = new XML();
playlist.ignoreWhite=true;
playlist.onload = function (success) {
if(success) {
_global.songname = [];
_global.songfile = [];
for (var i=0; i<playlist.firstChild.childNodes.length; i++) {
_global.songname* = playlist.firstChild.childNodes*.attributes.name;
_global.songfile* = playlist.firstChild.childNodes*.attributes.file;
trace(songname*+" "+songfile*);
}
_root.createEmptyMovieClip(“sound_mc”,1);
_root.sound_mc.sound_obj = new Sound();
_root.sound_mc.songStarter(songfile[0],songname[0]);
} else {display_txt.text=“Error loading XML”}
}
MovieClip.prototype.songStarter = function (file, name) {
this.sound_obj.loadSound(file,true)
this.onEnterFrame = function () {
if(this.sound_obj.position>0) {
delete this.onEnterFrame;
this._parent.display_txt.text=name;
} else {
this._parent.display_txt.text=“loading…”
}
}
}
playlist.load(“playlist.xml”);
this.sound_obj.onSoundComplete = function (){
(song_nr==songfile.length-1)? _global.song_nr=0 : _global.song_nr++;
_root.sound_mc.songStarter(songfile[song_nr],songname[song_nr]);
}
btn_play.onRelease = function () {
this._parent.sound_mc.songStarter(songfile[song_nr],songname[song_nr]);
}
btn_stop.onRelease = function() {
this._parent.sound_mc.sound_obj.stop();
}
btn_next.onRelease = function () {
(song_nr==songfile.length-1)? _global.song_nr=0 : _global.song_nr++;
_root.sound_mc.songStarter(songfile[song_nr],songname[song_nr]);
}
btn_prev.onRelease = function () {
(song_nr==0)? _global.song_nr=songfile.length-1 : _global.song_nr–;
_root.sound_mc.songStarter(songfile[song_nr],songname[song_nr]);
}
playlist.load(“playlist.xml”);