UNIX Passwd sync

[Tony Nichols]

Hi.
Ive had UNIX passwd sync working using win95 clients and a 
samba (latest) SCO server. Then it stopped. Here is a snippet from 
the log file:-
==============================
Invoking '/opt/K/SCO/Unix/5.0.4Eb/bin/passwd tnichols' as password 
change prog
ram.
[1999/10/21 12:26:51, 5] lib/util_sock.c:read_with_timeout(403)
  read_with_timeout: timeout read. EOF from client.
[1999/10/21 12:26:51, 100] smbd/chgpasswd.c:talktochild(263)
  talktochild: chatbuf=[*1):*] responsebuf=[Setting password for user: 
tnichols
 
  Password request denied.
  Reason: your identity is not known.
==============================
The request fails almost immediately.

Can anyone tell me what that means? Ive checked the chat script 
and passwd command line and they seem fine. Besides, it DID 
work.

One think which has changed is that recently we started getting 
clients logging in from the other side of an ISDN link connected to 
our subnet. Any connection, do you think? (The server is also a 
WINS server. No WinNT anywhere).

Tony Nichols
Bedford Industries
South Australia.