iOS ads not shown on my app

[kerberosargos]

Hello,
When I test my app on ios simulator I can see test admob banner.
After published my app on iTunes, banner not shown on real device.

Do you have any idea where is my problem?

My ti.admob release version is 2.1.0 which I implement my project.

var $Admob = require('ti.admob');

if (OS_IOS) {
    Alloy.Globals.AdmobPubliserId = "ca-app-pub-2223887693172102/xxxxxxxx";
} 

if (OS_IOS) {

            var $AdmobIOS = $Admob.createView({
                height: 50,
                top: 0,
                debugEnabled: true,
                adBackgroundColor: 'black',
                adType: $Admob.AD_TYPE_BANNER,
                adUnitId : Alloy.Globals.AdmobPubliserId,
                testDevices : [$Admob.SIMULATOR_ID]
            });

            $AdmobIOS.addEventListener('didFailToReceiveAd', function() {
                $FncTiApiInfo("Admob not received!");
                $.resetClass($.Admob, "hide");
            });

            $.Admob.add($AdmobIOS);
        }