System.Exception: Class not registered (Exception from HRESULT: 0x80040154) Error for Silverlight webcam.

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ASP.NET

Silverlight

Hello Friends,

I have copied the silverlight videochat samplecode from "silverlightvideochat.codeplex.com" to try a simple videochat application but getting the below mentioned error while capturing image.

"System.Exception: Class not registered (Exception from HRESULT: 0x80040154)
at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
at MS.Internal.XcpImports.CaptureGraph_Start(CaptureSource Source)
at System.Windows.Media.CaptureSource.Start()
at SocketCoder_WebCamSender.MainPage.btnActivate_Click(Object sender, RoutedEventArgs e)"


I am using 64 bit Operating System, silverlight-4

below is the code block, i am getting the above error on _capture.Start().

private void button1_Click(object sender, RoutedEventArgs e)
{
    // Start The Camera
    if (_capture != null)
    {
        _capture.Stop();
        _capture.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
        VideoBrush videoBrush = new VideoBrush();
        videoBrush.SetSource(_capture);
        rectVideo.Fill = videoBrush;
        if (CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess())
        {
            _capture.Start();
        }
    }
}

I have tried running the application by changing Target Platform to x86 but no success.

Please suggest,

Thanks,
Smitesh