title: C# WPF MediaElement Not opening video in XP
body: <p>I have a strange problem.</p>
  
  <p>I have a project that I have that simply opens up an mp4 video file and plays it. I have an event handler which I set a breakpoint in, and it gets into the Media_Opened handler I have and play it under Windows 7/64bit, but it does not even enter the handler when I play the same thing in WindowsXP 32bit.</p>
  
  <p>Is there some compatibility issue that I am not aware of?</p>
  
  <p>note: I am compiling in 32 bit mode.</p>
  
  <p>Thanks!</p>