title: Server response(IIS7) does not reach client on operations running > ~4+ minutes
body: <p>IIS 7 Tracing shows that request was process successfully:
  GENERAL_REQUEST_END BytesSent="767", BytesReceived="5697", HttpStatus="200", HttpSubStatus="0" </p>
  
  <p>But Fiddler(firebug, etc) does not show any response being received.</p>
  
  <p>Keep-Alive header is enabled on IIS.</p>
  
  <p>Any thoughts would be appreciated.</p>