Audio Video Playback

Question

 I'm trying to play a video file using ASP.NET but i get an error.

using Microsoft.DirectX.AudioVideoPlayback;
........

try

{

Video obj=new Video("d:\\download\\film.mpg");

obj.Play();

}

and the following error appears:
===================================
"An unhandled exception of type 'System.IO.FileNotFoundException' occurred in microsoft.directx.audiovideoplayback.dll

Additional information: File or assembly name Microsoft.VisualC, or one of its dependencies, was not found."
==============================================
FileNotFoundException.....but the path is correct "d:\\download\\film.mpg".
What could be the problem??