KeyobardEvent issue with Starling

gistfile1.as

package net.tw.weatherApp.views.prompt {
	import flash.events.KeyboardEvent;
	import flash.ui.Keyboard;
	
	import org.josht.starling.foxhole.controls.Button;
	import org.josht.starling.foxhole.controls.List;
	import org.josht.starling.foxhole.controls.TextInput;
	import org.josht.starling.foxhole.data.ListCollection;
	import org.osflash.signals.Signal;
	
	import starling.core.Starling;
	import starling.display.Quad;
	import starling.display.Sprite;
	
	public class LocationFinder extends Sprite {
		
		protected static const PADDING:uint=20;
		protected var _searchInput:TextInput;
		
		public const searchRequested:Signal=new Signal(String);
		public const locationSelected:Signal=new Signal(Location);
		
		public function init():void {
			_searchInput=new TextInput();
			_searchInput.x=_searchInput.y=PADDING;
			_searchInput.width=stage.stageWidth-2*PADDING;
			addChild(_searchInput);
			Starling.current.nativeStage.addEventListener(KeyboardEvent.KEY_DOWN, onKey);
		}
		protected function onKey(e:KeyboardEvent):void {
			trace(e.keyCode, e.charCode, e.keyLocation, Keyboard.ENTER);
			if (e.keyCode==Keyboard.ENTER) {
				trace('search');
				onSearchGo();
			}
		}
		protected function onSearchGo(target:Button=null):void {
			searchRequested.dispatch(_searchInput.text);
		}
	}
}