How to use Yahoo Maps API with Flash AS3

package {
	// libraries used by yahoo maps
	import com.yahoo.maps.api.YahooMap;
	import com.yahoo.maps.api.YahooMapEvent;
	import com.yahoo.maps.api.core.location.LatLon;
	import flash.display.Sprite;
	public class yahoomap extends Sprite {
		// creating a Yahoo map object
		public var my_yahoo_map:YahooMap = new YahooMap();
		// keycode
		var key:String="lHsd5HTV34HrkDmmwIa1P4.upNCGCbAUBoYFRaO0jJYAEgG8LV8ZyygbP6w_x.nBmNPRYwr2Jg--";
		public function yahoomap() {
			// adding an event when the map is initialized
			my_yahoo_map.addEventListener(YahooMapEvent.MAP_INITIALIZE, on_map_initialized);
			// defining how the map should be initialized...
			// the parameters represent the keycode and the stage width and hieht
			my_yahoo_map.init(key, stage.stageWidth, stage.stageHeight);
			// adding pan control
			my_yahoo_map.addPanControl();
			// adding zoom control
			my_yahoo_map.addZoomWidget();
			// adding type control (allows you to switch among street, satellite and hybrid)
			my_yahoo_map.addTypeWidget();
			// adds the scale control
			my_yahoo_map.addScaleBar();
			// adding the object on stage
			this.addChild(my_yahoo_map);
		}
		private function on_map_initialized(event:YahooMapEvent):void {
			// setting the zoom level... it ranges from 1 (closest) to 17
			my_yahoo_map.zoomLevel=14;
			// setting the latitude and longitude of the map
			my_yahoo_map.centerLatLon=new LatLon(20.349230,-74.498468);
		}
	}
}