socket.error: (32, 'Broken pipe'): need help

[Junhua Deng (AL/EAB)]

Hi,
I have a simple server-client application with threading. It works fine when both server and client on the same machine, but I get the following error message if the server is on another machine:

... ...
    self.socket.send(outgoingMsg)
socket.error: (32, 'Broken pipe')

I do not know where to start with? 

Thanks
Junhua