How to use nextScene.gotoandplay link using class property (external code.as)

i try this code but i got error

package  {

                        import flash.display.SimpleButton;

                        import flash.display.MovieClip;

                        import flash.events.MouseEvent;

                        public class np extends SimpleButton {

                        public function np() {

                                                this.addEventListener(MouseEvent.CLICK, clickF);

                                                }

                                                private function clickF(e:MouseEvent):void{

                                                MovieClip(this.root).nextScene(),gotoAndStop(1);

                        }

            }

}

Call to possibly undefined method gotoanStop

Note: i want to go next scene