[silin]

смотри разницу между onLoadComplete и onLoadInit

_root.createEmptyMovieClip("swf", 1);
var loader = new MovieClipLoader();
loader.addListener(this)
loader.loadClip("Arial.swf", swf);

//function onLoadComplete(){//как ты описал	
function onLoadInit() {//нормально
	swf.createTextField("txt", this.getNextHighestDepth(), 50, 50, 200, 100);
	swf.txt.border = true;
	swf.txt.embedFonts = true;
	swf.txt.borderColor = 0x000099;
	var tf = new TextFormat();
	tf.font = "Arial";
	tf.size = 40;
	tf.color = 0xFF0000;
	swf.txt.text = "Line 1.\nLine 2.";
	swf.txt.setTextFormat(tf);
}