无法从azure通知中心获取windows phone 8中的磁贴推送通知

我编写了通过azure通知中心向windows phone 8发送推送通知的代码。 我能够向windows phone 8发送toast通知，windows phone 8也能够获得通知。但当我发送磁贴通知时，它成功地发送了磁贴通知，但windows phone 8没有收到此磁贴通知

在获取通道Uri时，我已经使用了BindToSellTile和BindToSellToast，之后我将通过此通道Uri进行注册，并检查了windowsphone项目清单中的IDCAPPUSH_通知功能，以允许推送通知

下面是将设备绑定到平铺和土司的代码

public  void GetNotificationChannel()
{
    /// Holds the push channel that is created or found.
    HttpNotificationChannel pushChannel;

    // The name of our push channel.
    string channelName = "ToastChannel";


    // Try to find the push channel.
    pushChannel = HttpNotificationChannel.Find(channelName);

    // If the channel was not found, then create a new connection to the push service.
    if (pushChannel == null)
    {
        pushChannel = new HttpNotificationChannel(channelName);

        // Register for all the events before attempting to open the channel.
        pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
        pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);

        // Register for this notification only if you need to receive the notifications while your application is running.
        pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(PushChannel_ShellToastNotificationReceived);

        pushChannel.Open();

        // Bind this new channel for toast  and tile notifications.
           pushChannel.BindToShellToast();
   pushChannel.BindToShellTile();


    }
    else
    {
        // The channel was already open, so just register for all the events.
        pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
        pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);

        // Register for this notification only if you need to receive the notifications while your application is running.
        pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(PushChannel_ShellToastNotificationReceived);

        // Display the URI for testing purposes. Normally, the URI would be passed back to your web service at this point.
        System.Diagnostics.Debug.WriteLine(pushChannel.ChannelUri.ToString());
        //MessageBox.Show(String.Format("Channel Uri is {0}",
        //    pushChannel.ChannelUri.ToString()));

    }
}

下面的代码用于发送磁贴通知

private static async void SendWindowsPhone8ToastNotification()
        {
            try
            {


                string windowsPhone8ToastFinalTemplate = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
                                                            "<wp:Notification xmlns:wp=\"WPNotification\" Version=\"2.0\">" +
                                                              "<wp:Tile Id=\"txt1\" Template=\"IconicTile\">" +
                                                                "<wp:SmallIconImage>http://flyosity.com/images/_blogentries/networkicon/step2.png</wp:SmallIconImage>" +
                                                                            "<wp:IconImage>http://flyosity.com/images/_blogentries/networkicon/step2.png</wp:IconImage>" +
                                                                            "<wp:WideContent1 >This is sample</wp:WideContent1>" +
                                                                            "<wp:Count >1</wp:Count>" +
                                                                            "<wp:Title >Good</wp:Title>" +
                                                                            "</wp:Tile>" +
                                                                            "</wp:Notification>";            


                var notificationHub = GetNotificationHubClient();

                NotificationOutcome n = await notificationHub.SendMpnsNativeNotificationAsync(HttpUtility.HtmlEncode(windowsPhone8ToastFinalTemplate));


            }
            catch (Exception ex)
            {
                throw;
            }
        }

我能够在没有任何异常的情况下将磁贴通知发送到通知中心，并在发送后从通知中心获取状态。但设备未收到磁贴通知

在windows phone 8中，我在代码的某个地方漏掉了或犯了错误，从而获得了磁贴通知。请帮忙

private static async void SendWindowsPhone8ToastNotification()
        {
            try
            {


                string windowsPhone8ToastFinalTemplate = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
                                                            "<wp:Notification xmlns:wp=\"WPNotification\" Version=\"2.0\">" +
                                                              "<wp:Tile Id=\"txt1\" Template=\"IconicTile\">" +
                                                                "<wp:SmallIconImage>http://flyosity.com/images/_blogentries/networkicon/step2.png</wp:SmallIconImage>" +
                                                                            "<wp:IconImage>http://flyosity.com/images/_blogentries/networkicon/step2.png</wp:IconImage>" +
                                                                            "<wp:WideContent1 >This is sample</wp:WideContent1>" +
                                                                            "<wp:Count >1</wp:Count>" +
                                                                            "<wp:Title >Good</wp:Title>" +
                                                                            "</wp:Tile>" +
                                                                            "</wp:Notification>";            


                var notificationHub = GetNotificationHubClient();

                NotificationOutcome n = await notificationHub.SendMpnsNativeNotificationAsync(HttpUtility.HtmlEncode(windowsPhone8ToastFinalTemplate));


            }
            catch (Exception ex)
            {
                throw;
            }
        }