[C# 2.0] Comment administrer un serveur de streaming ?

Bonjour a tous,
depuis quelquesjour je m arrache les cheveux sur windows Media service, je tente de faire une appli asp.net pour administrer un serveur de streaming mais

je bloque des la creation d'un flux video :

Code:

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Microsoft.WindowsMediaServices.Interop;
using System.Runtime.InteropServices;
 
public class clVideo
{
    string csServerName = "http://localhost";
    public clVideo(string csServerName)
    {
        this.csServerName = csServerName;
    }
 
    public void CreatePublishingPoint()
    {
           WMSServer Server;
            IWMSBroadcastPublishingPoint BCPubPoint;
        try
        {
            // Create the WMSServer object.
            Server = new WMSServerClass();
 
            // Add a new broadcast publishing point.
            BCPubPoint = (IWMSBroadcastPublishingPoint)Server.PublishingPoints.Add("PublishedDave",
                WMS_PUBLISHING_POINT_CATEGORY.WMS_PUBLISHING_POINT_BROADCAST,
                "http://localhost:1755");
        }
        catch (COMException comExc)
        {
            // TODO: Handle COM exceptions.
        }
        catch (Exception exc)
        {
            // TODO: Exception handler goes here.
        }
        finally
        {
            // TODO: Clean-up code goes here.
        }
    }
 
}

j'ai une exception COMException qui se declenche tres explicite :
Retrieving the COM class factory for component with CLSID {845FB959-4279-11D2-BF23-00805FBE84A6} failed due to the following error: 80040154.

J'ai pourtant installe le SDK pour windows media 9....

merci a vous

ps: si quelqu'un a de bon tutaux sur le sujet je ne suis pas contre