Puzzling me :/

programming flash
1 
function playSong(e:MouseEvent):void{
channel = snd.play(pos);
songInfo.scrollingText.tf.text = (artist + "  -  "  + songName).toUpperCase();
lineMetrics = songInfo.scrollingText.tf.getLineMetrics(0);
startX = lineMetrics.x;
wide = songInfo.scrollingText.tf.textWidth
TweenMax.to(songInfo.scrollingText, 4, {x:-wide, y:0, ease: Linear.easeNone, repeat:-1});

Works good but only shows the first letter in the
songInfo.scrollingText.tf.text string

Any help please