Can't see Mac client volumes

[jthjth]

I'm running Windows multiserver 7.5.387. Windows clients work fine. However Mac OSX clients return "can't track volumes error -509 unknown service" when the volume tab on the client properties dialogue on the windows servier is accessed. The same error is returned when I attempt to backup the Macs. The Mac is running OSX 10.4.9 and client 6.1.130. A Mac with client 6.0.110 has the same problem. We've tried the obvious, like disabling firewalls, but ot no avail. Any ideas? What bothers me is that hunting this forum and Google seems to indicate that nobody else is suffering from this problem.

 

thanks for any pointers....