Connectivity problems

I'm having problems connecting to Wyg R23. (latest version of H3PC and connectivity driver)

Wyg is running on Win XP and H3PC is running on Vista.
Connectivity driver gives a can't get file handle error.

Connectivity works when using the same computer (Win XP), but if I try to use separate computer with H3PC running on Vista, I get the error. Also, I can't get rid of the error unless I shutdown the Vista.
If I remember right I also had to reboot the XP computer.
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