AdMob Not work

import com.codealchemy.ane.admobane.AdMobEvent;
import com.codealchemy.ane.admobane.AdMobManager;
import com.codealchemy.ane.admobane.AdMobPosition;
import com.codealchemy.ane.admobane.AdMobSize;
import flash.events.Event;

//Imports
var adMobManager:AdMobManager = AdMobManager.manager;
const BANNER_ID = "ca-app-pub-2071825937293737/1261153404";
var dispatcher:EventDispatcher;
var isShow:Boolean = false;

//Variables
stage.addEventListener(Event.ENTER_FRAME, addsin);

function addsin(e:Event){

			// Get the AdMobManager instance
			adMobManager = AdMobManager.manager;
			// Check if the Extension is supported
			if(adMobManager.isSupported){
				// Get the dispatcher instance
				dispatcher = adMobManager.dispatcher;
				// Set Operation settings
				adMobManager.verbose = true;
				adMobManager.operationMode = AdMobManager.TEST_MODE;
				adMobManager.testDeviceID = "Android";


				// Set AdMobId settings
				adMobManager.bannersAdMobId = "ca-app-pub-2071825937293737/1261153404";

				// Add Event Listeners

				// Disable all Button by default until the banner is loaded

				// Create The Banner
				adMobManager.createBanner(AdMobSize.BANNER,AdMobPosition.BOTTOM_CENTER,BANNER_ID, null, true);
			}
}