invalid socket on my dr servers why?

[conceptdesign]

When ever I try to use Dr I get an invalid socket error on my slave machines in the vray messages - Any idea why?
Mike

[Candelero]

Any firewalls or anti-virus softs, which can block the DR ?

Best regards,
nikki Candelero

[conceptdesign]

I have even shut down windows firewall and still I get the same problem - Here is the wierd part - If I restart Viz and load the scene Dr seems to start working (no socket error) and it finds the server - But after the calcs are complete, the server stops responding and the local machine does all the rendering (Almost like something in Viz is timing out) I have been seeing the same thing with Backburner - If I first open a scene I am able to backburn it to the slave with no problem after about 5 minutes I get an unknown error if I try to send the job to the slave. Is there anything in Viz that would cause this timeout? It was working great - Then this started -

Thanks for your help -
Mike