1180 Error with event listener

programming flash
1

I’m trying make a simple action script that when a county
is clicked I get a trace return telling me the county was clicked.
I have a .fla file named Map that has a symbol named “Morrow” in it,
and a .as file named Morrow.as in the same folder with the following
code:

package {

import flash.display.MovieClip;
import flash.events.MouseEvent;

public class Morrow extends MovieClip {
	addEventListener(MouseEvent.CLICK , Morrow ); 
	
	public function Morrow(event:MouseEvent):void 
	{
		trace ("Morrow is clicked");
		
	}
}

}

I keep getting a 1180: Call to a possibly undefined method addEventListener.