TypeError: Error #1009: Cannot access a property or method of a null object reference.
	at index_fla::MainTimeline/frame1()

function loadContent(url:String):void
{
	var contentLoader:Loader = new Loader();
	//var contentRequest:URLRequest = new URLRequest(url+"/index.swf");
	
	contentLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onCompleteContent);
	contentLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgressContent);
	contentLoader.load(new URLRequest(url+"/index.swf"));
	
	function onCompleteContent(loadEvent:Event):void
	{
			content_mc.addChild(loadEvent.currentTarget.content);
			content_mc.x = stage.stageWidth/2 - contentWidth/2;
			content_mc.y = stage.stageHeight/2 - contentHeight/2;
			
			myContent = contentLoader.content as MovieClip;
			
			contentLoader.contentLoaderInfo.removeEventListener(Event.COMPLETE, onCompleteContent);
			contentLoader.contentLoaderInfo.removeEventListener(ProgressEvent.PROGRESS, onProgressContent);
	}
	
	function onProgressContent(contentProgress:ProgressEvent)
	{
		var percent:Number = contentProgress.bytesLoaded/contentProgress.bytesTotal;
	}
}