I'm wondering if it has to do with port confliction. Try changing your DNAS (server) portbase to something else in the config:
; PortBase. This is the IP port number your server will run on. The
; value, and the value + 1 must be available. If you get a fatal error when
; the DNAS is setting up a socket on startup, make sure nothing else on the
; machine is running on the same port (telnet localhost portnumber -- if you
; get connection refused then you're clear to use that port). Ports < 1024
; may require root privledges on *nix machines. The default port is 8000.