Error handling for file not file

[eggler]

Which I thought was going to be really easy. Then I learn the error is probably not the type to be handled by try... catch. Sooooo I try listening for the event, but it doesn't seem to care for my AsyncErrorEvent or how I've done it below with the IOErrorEvent...

Still gives me "Error #2044: Unhandled IOErrorEvent:. text=Error #2035: URL Not Found."

What am I doing wrong? I looked at the senocular (http://www.senocular.com/flash/tutor...?page=3#errors) tut,and thought it may be something to do with "new Loader()", bit I can't seem to comeup with a way around that.

 
function upHandler_SmallSite(event:MouseEvent):void {	
	//load the image for this location
	var pictLdr:Loader = new Loader();
	var pictURL:String = "images/" + aList[array.indexOf(event.target)].@id + ".jpg";
	var pictURLReq:URLRequest = new URLRequest(pictURL);
        pictLdr.load(pictURLReq);
   		pictLdr.contentLoaderInfo.addEventListener(Event.COMPLETE, imgLoaded);
		pictLdr.addEventListener(IOErrorEvent.IO_ERROR, loadIOError);
		mcBigInfoBox.mcBigInfo_Image.addChild(pictLdr);
   }   
   
// Handler for IO error
function loadIOError(event:IOErrorEvent):void {
    trace("ErroR");
}