[Samba] computer name instead of username?

[steven.tse at possehlelectronics.com.hk]

Hi,

Since the "Failed to verify incoming ticket" problem on Samba3.0.1, I rolled
back to 3.0.  All the authentication and connection jobs are done successfully
for 3.0, and this time clients able to browse to the Samba.  However, I keep ask
for the username, password when I access to any of the shared folder.  The log
of client shows:

[2004/01/06 17:44:50, 1] smbd/sesssetup.c:reply_spnego_kerberos(218)
  Username CLIENT$ is invalid on this system

where CLIENT$ is the computer name of client computer.  I wonder why it
authenticate with computer name rather than user name.

smb.conf
========
[global]
        workgroup = CHAETO
        realm = CHAETO.COM
        server string = Test Linux File Server
        security = ADS
        auth methods = winbind
        password server = pdc
        client lanman auth = No
        client plaintext auth = No
        log file = /var/log/samba/log.%m
        min protocol = LANMAN1
        local master = No
        wins server = 192.168.0.248
        ldap ssl = no
        idmap uid = 10000-20000
        idmap gid = 10000-20000
        template homedir = /home/winnt/%D/%U
        template shell = /bin/bash
        winbind separator = +

[public]
        comment = Public Stuff
        path = /public/shared
        valid users = '@CHAETO+Domain Users'
        write list = '@CHAETO+Domain Users'
        force group = ntgroup
        create mask = 0666
        directory mask = 0777

Please help, thankyou

Best Rgds.,
Steven