OpenCV2.1 in Visual Studio 2010

[fatal]

I set up the OpenCV2.1 for Visual Studio Professional 2010 following the instructions in http://opencv.willowgarage.com/wiki/. When I wanted to run a simple webcam program, I got an error. (I'm sure that there is no error in the implemeted code.)
Here is what I get as an output (error)
http://www.glowfoto.com/static_image/11-001201L/7939/png/10/2010/img5/glowfoto

How can I solve this problem?

Thanks in Advance.

[Dufresne]

Have you tried to put break point and run it step by step ?
If you haven't , you should. You can learn at which line error occurs.