What is: Impicit coersion of a value of type flash.net?

programming flash
1

What is: Impicit coersion of a value of type flash.net: URLRequest to an unrelated type Class.

I was trying this as a function:



var imgLoader:Loader = new Loader();
    imgLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgressStatus);
    imgLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoaderReady);

var fileRequest:URLRequest;


function loadImage(curImg, targetMC)
{
    fileRequest:URLRequest = new URLRequest(curImg);
    imgLoader.load(fileRequest);
    imgLoader.x = targetMC.x;
    imgLoader.y = targetMC.y;

}
loadImage(showData["seg1thumb"], tmbBox3_mc);