Flash with background sound (I got error #2037)

Question

Hallo.
I am a beginner at AS3 programming. I like to make a flash with background sound (*.mp3 files from *.xml list). Everything works fine, but when I press "onClick" button I got output error.
Error: Error #2037: Functions called in incorrect sequence, or earlier call was unsuccessful.
    at flash.media::Sound/_load()
    at flash.media::Sound/load()
    at proov_fla::MainTimeline/F_MP3_laadimine()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at flash.net::URLLoader/onComplete()
My Script:
var MP3_PLAYLIST:String = "playlist1.xml";
var LAADI_MUUSIKA:URLRequest;
var MUUSIKA:Sound = new Sound();
var MUUSIKA_KANAL:SoundChannel = new SoundChannel();
var HETKE_MUUSIKA:Sound = MUUSIKA;
var POSITSIOON:Number;
var HETKE_INDEX:Number = 0;
var KAS_MUUSIKA_MÄNGIB:Boolean = true;
var XML_FAIL:XML;
var MUUSIKA_NIMEKIRI:XMLList;
var MP3_LAADIJA:URLLoader = new URLLoader();
MP3_LAADIJA.addEventListener(Event.COMPLETE, F_MP3_laadimine);
MP3_LAADIJA.load(new URLRequest(MP3_PLAYLIST));
onClick.addEventListener(MouseEvent.CLICK, järgminelugu);
function järgminelugu(e:MouseEvent):void
    MP3_PLAYLIST = "playlist2.xml";
    MP3_LAADIJA.load(new URLRequest(MP3_PLAYLIST));
function F_MP3_laadimine(e:Event):void
    XML_FAIL = new XML(e.target.data);
    MUUSIKA_NIMEKIRI = XML_FAIL.track;
    LAADI_MUUSIKA = new URLRequest(MUUSIKA_NIMEKIRI[0].path);
    MUUSIKA.load(LAADI_MUUSIKA);
    MUUSIKA_KANAL = MUUSIKA.play();
My full purpose will look like this http://uusrand.pri.ee/galerii/proov/

Answer 1

Hallo.
Can anybody help me to add an actionscript line(s) into attach file "newXML.fla".
In this file I have a script to play mp3 files from xml list (this works).
I also add button to load new mp3 fileslist from new xml file. But I don't know how.
My Script:
var MP3playlist:String = "http://uusrand.pri.ee/mp3/playlist.xml";
var MP3file:URLRequest;
var MP3SoundURL:Sound = new Sound();
var MP3sound_channel:SoundChannel = new SoundChannel();
var xml:XML;
var playlist_index:XMLList;
var xml_loader:URLLoader = new URLLoader();
var MP3index:Number = 0;
xml_loader.addEventListener(Event.COMPLETE, originalXMLfile);
xml_loader.load(new URLRequest(MP3playlist));
onClick.addEventListener(MouseEvent.CLICK, nextXMLfile);
function nextXMLfile(e:MouseEvent):void
    if (MP3playlist == "http://uusrand.pri.ee/mp3/playlist_loodus.xml") {
        MP3playlist = "http://uusrand.pri.ee/mp3/playlist.xml";
    } else {
        MP3playlist = "http://uusrand.pri.ee/mp3/playlist_loodus.xml";
function originalXMLfile(e:Event):void
    xml = new XML(xml_loader.data);
    playlist_index = xml.track;
    MP3file = new URLRequest(playlist_index[0].path);
    MP3SoundURL.load(MP3file);
    MP3sound_channel = MP3SoundURL.play();
    MP3sound_channel.addEventListener(Event.SOUND_COMPLETE, nextSong);
function nextSong(e:Event):void
    if (MP3index < (playlist_index.length() - 1)){
        MP3index++;
    } else {
        MP3index = 0;
    var NextSongRequest:URLRequest = new URLRequest(playlist_index[MP3index].path);
    var NextSongURL:Sound = new Sound(NextSongRequest);
    MP3sound_channel.stop();
    MP3sound_channel = NextSongURL.play();
    MP3sound_channel.addEventListener(Event.SOUND_COMPLETE, nextSong);