Hello Fred,
Is server.vi a VI that you wrote? Or is it one of the LabVIEW shipping examples, Data Server.vi or Simple Data Server.vi? I was able to run two instances of Simple Data Server.vi on different ports and connect to them simultaneously on different computers. What this example does is simply open up a TCP listener on a certain port. There should be no conflict in starting another TCP listener as long as it is on a different port.
If none of these suggestions help, or if I�m not correctly understanding your issue, please reply with comments or answers to the discussion above and any additional information that may help, and I�ll be happy to look further into it.
Have a nice day!
Robert M
Applications Engineer
Robert Mortensen
Software Engineer
National Instruments