loading external data not working

hello! I'm relatively new with flash and actionscript, so this is my first question for you:

I have a listBox and I want to take data from a php file and insert it in my list box. But I am doing something wrong, because it's not working.

The php file retrives data in the following format:

echo "nrsongs=" . $nr_songs;

$i=0;

foreach($song_ids as $song_id){

$i++;

echo "&song_id" . $i . "=" . $song_ids[$i];

echo "&song_title" . $i . "=" . $song_title[$i];

echo "&song_artist" . $i . "=" . $song_artist[$i];

}

The php code works, if I call it directly in the url it retrives the data corectly.

So, here is my actionscript code:

loadAllLyrics();

var loadAllLyricsRequest:URLRequest = new URLRequest("lyrics.php?method=get");

var loadAlLyricsLoader:URLLoader = new URLLoader();

function loadAllLyrics()

{

lyricsList.removeAll();        // working

loadAlLyricsLoader.addEventListener(Event.COMPLETE, onAllLyricsLoaded);

loadAlLyricsLoader.load(loadAllLyricsRequest);

}

function onAllLyricsLoaded(evt:Event):void

{

var nr_songs:String = loadAlLyricsLoader.data.nrsongs;

var song_id:String = loadAlLyricsLoader.data.song_id1;

var song_title:String = loadAlLyricsLoader.data.song_title1;

var song_artist:String = loadAlLyricsLoader.data.song_artist1;

lyricsShow_txt.text = song_id + " " + song_title + " " + song_artist;   // not working...

lyricsList.addItem(song_artist + " - " + song_title);    // not working...

}

for simplicity I want to add only the first "song".