Server response(IIS7) does not reach client on operations running > ~4+ minutes

IIS 7 Tracing shows that request was process successfully: GENERAL_REQUEST_END BytesSent="767", Bytes开发者_如何学运维Received="5697", HttpStatus="200", HttpSubStatus="0"

But Fiddler(firebug, etc) does not show any response being received.

Keep-Alive header is enabled on IIS.

Any thoughts would be appreciated.

Just because a client requests something don't mean it sticks around for the answer. I'd up the client app's timeouts if possible and see if that works.