Picture not displaying?

I am trying to write a class file for loading a movieclip but it is not working. I am not even getting any error message.

package {

    import flash.display.*;
    import flash.events.*;
    import flash.net.*;

    public class CompletePic extends MovieClip {

        public var imageLoader:Loader = new Loader();
        public var loadPic_mc:MovieClip = new MovieClip();
        public var url:String = "pictures/pic3.jpg";

        public function CompletePic() {

            addChild(loadPic_mc);
            imageLoader.load(new URLRequest(url));
            loadPic_mc.addChild(imageLoader);

        }
    }
}

It is unable to display the picture. I have used addChild to display the picture to the stage. But it’s not working. What could be the possible reason.