Fixed size actionscript project

I have an ActionScript project in flex which I place the following code:

package {
    import flash.display.Sprite;
    import flash.events.Event;

    public class testing extends Sprite
    {
        public function testing()
        {
            stage.scaleMode = "noScale"
            stage.align = "TL"
            stage.addEventListener(Event.RESIZE, onResize);
        }
        public function onResize(event:Event):void{
            trace("Width: "+stage.stageWidth);
            trace("Height: "+stage.stageHeight);
        }
    }
}

The problem is when I resize below 465 width it keeps saying the width is 465, it stays fixed. Is there a setting in Flex I am missing? I didn’t see any width or height properties when creating the project? TIA:beam: