Picture not set in Image control with Uri

See more:

C#

WPF

C#4.0

My Solution Explorer image :
http://postimage.org/image/nyrskovvn/[^]

my code in PopupWinHelper :

        var img = new Image
                          {
                              BitmapEffect = new DropShadowBitmapEffect(),
                              Stretch = Stretch.Fill,
                              Source = new BitmapImage(new Uri("/WpfApplication1;component/images/PopupImage.png"))
                          };

my code in Mainwindow :

private void button1_Click(object sender, RoutedEventArgs e)
       {
           cuswin.PopupWinHelper.ShowPopUp(150,300,"asdad",new Thickness(20));
       }

Why does this error occur?

then I use :

var img = new Image
                 {
                     BitmapEffect = new DropShadowBitmapEffect(),
                     Stretch = Stretch.Fill,
                     Source = new BitmapImage(new Uri("/images/PopupImage.png",  UriKind.Relative))
                 };

no error occurs but the picture is not shown in image control.