Problem creating a new object from Library with custom class attached

programming flash
1

I have the following as code in a separate file placed in the root folder of the swf file. The as file is the class for a MovieClip in the library.

When i manually place the library symbol on the stage, the MC works fine and draws the square with the nodes.
However, when I try to create a copy using ’ new sqMC();’ code, I get an error.

It would be wonderful if somebody could explain what I am doing wrong.

package {
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.geom.Point;
    import flash.display.MovieClip;
    import flash.display.Shape;
    import flash.geom.Rectangle;
    import flash.geom.Matrix;

    public class sqMC extends MovieClip {

        public function sqMC():void {

            var drawing:Shape = new Shape();

            var n1:MovieClip = new node();
            var n2:MovieClip = new node();
            var n3:MovieClip = new node();
            var n4:MovieClip = new node();

            var origWidth:uint = n1.width;
            var origHeight:uint = n1.height;


            addChild(drawing);
            addChild(n1);
            addChild(n2);
            addChild(n3);
            addChild(n4);

            n1.x=n1.y=0;

            n2.x=100;
            n2.y=0;

            n3.x=n3.y=100;

            n4.x=0;
            n4.y=100;
            n1.visible=false;
            n2.visible=false;
            n3.visible=false;
            n4.visible=false;

            this.addEventListener(Event.ENTER_FRAME, drawSq);
            n1.addEventListener(MouseEvent.MOUSE_DOWN, dragPressHandler);
            n2.addEventListener(MouseEvent.MOUSE_DOWN, dragPressHandler);
            n3.addEventListener(MouseEvent.MOUSE_DOWN, dragPressHandler);
            n4.addEventListener(MouseEvent.MOUSE_DOWN, dragPressHandler);
            stage.addEventListener(MouseEvent.MOUSE_UP, dragReleaseHandler);

            function drawSq(event:Event):void {
                drawing.graphics.clear();
                drawing.graphics.lineStyle(1, 0x000000, 00);
                drawing.graphics.beginFill(0x0000FF, 1);
                drawing.graphics.moveTo(n1.x, n1.y);
                drawing.graphics.lineTo(n2.x, n2.y);
                drawing.graphics.lineTo(n3.x, n3.y);
                drawing.graphics.lineTo(n4.x, n4.y);
                drawing.graphics.lineTo(n1.x, n1.y);
                drawing.graphics.endFill();

                function dragPressHandler(event:MouseEvent):void {
                    event.target.startDrag(false);
                }

                function dragReleaseHandler(event:MouseEvent):void {
                    event.target.stopDrag();
                }

                parent.paper.addEventListener(MouseEvent.MOUSE_DOWN, hideNodes);
                function hideNodes(event:MouseEvent):void {
                    if (event.target!=sqMC) {
                        n1.visible=false;
                        n2.visible=false;
                        n3.visible=false;
                        n4.visible=false;
                    }
                }

                function showNodes(event:MouseEvent):void {
                    //enableTT=false;

                    var p1:Point=new Point(n1.x, n1.y);
                    var p2:Point= new Point(n2.x, n2.y);
                    var p3:Point = new Point(n3.x, n3.y);
                    var p4:Point= new Point(n4.x, n4.y);

                    var nMatrix:Matrix= n1.transform.concatenatedMatrix;
                    nMatrix.invert();
                    nMatrix.concat(n1.transform.matrix);
                    n1.transform.matrix = nMatrix;
                    n2.transform.matrix = nMatrix;
                    n3.transform.matrix = nMatrix;
                    n4.transform.matrix = nMatrix;

                    n1.x=p1.x;
                    n1.y=p1.y;
                    n2.x=p2.x;
                    n2.y=p2.y;
                    n3.x=p3.x;
                    n3.y=p3.y;
                    n4.x=p4.x;
                    n4.y=p4.y;

                    n1.visible=true;
                    n2.visible=true;
                    n3.visible=true;
                    n4.visible=true;
                }
            }
        }
    }
}