samba - Jan 2010 - pipe error

Hi,

When I try to connect to samba server from windows XP machines, I get an err
"No process is on the other end of the pipe" .But some of the users
running
windows vista said they are not having any issues on that.

The log.wb log says:

[2010/01/20 16:43:41.368049, 0, pid=23202, effective(0, 1), real(0, 1)]
rpc_client/cli_pipe.c:rpc_api_pipe(790)
  rpc_api_pipe: Remote machine abc.xyz.com pipe \NETLOGON fnum
0x4000returned critical error. Error was NT_STATUS_PIPE_DISCONNECTED


Samba is 3.0.34 running under solaris 9.

Thanks
Paras.