Can you explain why I get the following error while trying to upload a .doc file.

 

Silverlight : The upload task is interrupted!Unable to get web http response.System.Net.WebException: The remote server returned an error: NotFound   at System.Net.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)   at System.Net.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)   at Silverlight.FileItem._OnGetResponse(IAsyncResult ar)