Angelo:
Yep, it's a bug. We inadvertently used the same port number. It'll be fixed in NI-VISA 3.0. There's no real workaround with the shipping version (at the API level) if you need both running at the same time.
However, if you're using LabVIEW, you might want to consider using VI server to do your remoting at a higher level.
Dan Mondrik
Senior Software Engineer, NI-VISA
National Instruments