KinectStatus-Connected Disconnected not getting displayed dont know why?

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XAML

WPF

Kinect

I want to display the kinect status-Connected or disconnected and the Device Connection ID. Connection ID is getting displayed,but Status is not getting displayed in Textblock My code is-
mainwindow.xaml.cs-
public partial class MainWindow : Window
{

KinectSensor sensor;
private MainWindowViewModel viewModel;
public MainWindow()
{

InitializeComponent();
this.Loaded += MainWindow_Loaded;
this.viewModel = new MainWindowViewModel();
this.DataContext = this.viewModel;

}


void KinectSensors_StatusChanged(object sender, StatusChangedEventArgs e)
{

switch (e.Status)
{
case KinectStatus.Connected:
txtBlckStatus.Text = "Connected";


break;
case KinectStatus.Disconnected:
txtBlckStatus.Text = "Disconnected";

break;

}
}

void MainWindow_Loaded(object sender, RoutedEventArgs e)
{


if (KinectSensor.KinectSensors.Count > 0)
{
this.sensor = KinectSensor.KinectSensors[0];
KinectSensor.KinectSensors.StatusChanged += KinectSensors_StatusChanged;

this.StartSensor();
this.sensor.ColorStream.Enable();
this.sensor.DepthStream.Enable();
this.sensor.SkeletonStream.Enable();
}
else
{
MessageBox.Show("No Sensor Connected!!");
this.Close();
}

}

private void StartSensor()
{
if(this.sensor!=null && !this.sensor.IsRunning)
{
this.sensor.Start();
SetKinectInfo();

}
}


private void SetKinectInfo()
{
if(this.sensor!=null)
{
this.viewModel.ConnectionID = this.sensor.DeviceConnectionId;
}
}

}

mainwindow.xaml

<window x:class="KinectInfoBox.MainWindow" xmlns:x="#unknown">
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<grid>
<grid>
<grid.rowdefinitions>
<rowdefinition>
<rowdefinition>
<rowdefinition>

<grid.columndefinitions>
<columndefinition> <columndefinition>
<textblock grid.row="0" grid.column="0" text="Status:">
<textblock grid.row="0" grid.column="1" x:name="txtBlckStatus">
<textblock grid.row="1" grid.column="0" text="Connection ID">
<textblock grid.row="1" grid.column="1" text="{Binding ConnectionID}">





mainwindowviewmodel.cs--to display the changing connection id

namespace KinectInfoBox
{
public class MainWindowViewModel:INotifyPropertyChanged
{
private string _connectionIDValue;
public string ConnectionID
{
get { return _connectionIDValue; }
set
{
if(this._connectionIDValue!=value)
{
this._connectionIDValue = value;
this.OnNotifyPropertyChange("ConnectionID");
}
}
}
public void OnNotifyPropertyChange(string propertyName)
{
if(this.PropertyChanged!=null)
{
this.PropertyChanged.Invoke(this,newPropertyChangedEventArgs(propertyName));
}
}
public event PropertyChangedEventHandler PropertyChanged;
}
}