title: HTTP Error 404.3 - Not found - The page you are requesting cannot be served because of the extension configuration
body: <p>HTTP Error 404.3 - Not Found</p>
  
  <p>The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map.</p>
  
  <p>what could be the reason of this error for the WCF service hosted on IIS 7.</p>