[Twisted-web] Receiving gaierror 10093 getaddrinfo failed

[Information]

Hello,

I am receiving the following error when trying to start a tcp server 
with twisted with python 2.5:

gaierror: (10093, 'getaddrinfo failed')

and the code I am using to start the server is

reactor.listenTCP(5555, ServerFactory())
reactor.run(installSignalHandlers=0)

It doesn't cause this error on all systems, just some, and the system 
that is running this python code is able to access the Internet and 
successfully do DNS lookups. What else can be the issue? I

Thanks,
John