Samba: Problem joining RHEL 3 machine to a WIndows 2000 domain

Has anyone here successful joined a RHEL 3 machine as a member sever to
a Windows 2000 domain?

Here is my smb.conf file:
1. my windows 2000 domain is called TEST
2. my linux machine netbios name is called lxs01 which is the actual
machine name


[root@lxs01 samba]# more smb.conf
# Global parameters
[global]
workgroup = TEST
server string = Test Samba Server
netbios name = lxs01
security = domain
log file = /var/log/samba/%m.log
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
dns proxy = No
hosts allow = 192.168.1. 192.168.1.X
wins server = 192.168.1.X
idmap uid = 15000 - 20000
idmap gid = 15000 - 20000
winbind use default domain = Yes

[homes]
comment = Home Directories
#path = /home/testuser
valid users = %S
#guest ok = No
read only = No
browseable = Yes

Here is what happens

when I issue the following command:

net rpc join -Uadministrator%'admin-password'
[root@lxs01 log]# net rpc join -I 192.168.1.226
-Uadministrator%'admin123'
[2005/08/26 15:21:45, 0]
rpc_client/cli_netlogon.c:cli_nt_setup_creds(256)
cli_nt_setup_creds: request challenge failed
[2005/08/26 15:21:45, 0]
rpc_client/cli_netlogon.c:cli_nt_setup_creds(256)
cli_nt_setup_creds: request challenge failed
[2005/08/26 15:21:45, 0]
utils/net_rpc_join.c:net_rpc_join_newstyle(319)
Error domain join verification (reused connection):
NT_STATUS_INVALID_COMPUTER_NAME

Unable to join domain MYDHCP.

in /var/log/messages I get:

[root@lxs01 log]#

Aug 26 14:55:44 lxs01 net: [2005/08/26 14:55:44, 0]
rpc_client/cli_netlogon.c:cli_nt_setup_creds(256)
Aug 26 14:55:44 lxs01 net: cli_nt_setup_creds: request challenge
failed
Aug 26 14:55:44 lxs01 net: [2005/08/26 14:55:44, 0]
rpc_client/cli_netlogon.c:cli_nt_setup_creds(256)
Aug 26 14:55:44 lxs01 net: cli_nt_setup_creds: request challenge
failed
Aug 26 14:55:44 lxs01 net: [2005/08/26 14:55:44, 0]
utils/net_rpc_join.c:net_rpc_join_newstyle(319)
Aug 26 14:55:44 lxs01 net: Error domain join verification (reused
connection): NT_STATUS_INVALID_COMPUTER_NAME
Aug 26 14:55:44 lxs01 net: