Image OterGlowBitMapEffect

Hello sir/ madam,
                          I am trying to set the outerglow effect for image. But it is not been showing. The XAML code for this is as below

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">

   
       
           
               
           
       
   




Can any body please help with checkup on this code...... Please........
Thanks in advance.......