samba - Oct 2003 - No access to machine shares in Samba Domain

Hello All,

I have a Linux box running RH9 and Samba 2.2.7 as domain controller.

Last week, we bought a new (better!) box and migrated our Samba 
installation to the new box and apparently everything was working fine, 
until we noticed that shares created in the Windows machines are not 
accessible by anyone in the domain.

I've read all the docs and everything seems ok, but I can't get this to 
work.

I noticed that "smbclient -L //winmachine -U someuser" fails with 
"NT_STATUS_LOGON_FAILURE" but when trying the same in the Samba
Server,
it works.

I'm very lost here... Any help would be really appreciated...

TIA,
Paulo.

------------ SMB.CONF (relevant parts) ---------------------------
[global]
   load printers = yes
   printing = cups
   printcap name = cups
   disable spoolss = yes

#   printing = bsd
#   printcap name = /etc/printcap
#   load printers = yes
  guest account = nobody
#  invalid users = root
   workgroup = MYDOMAIN
   netbios name = yang
#   hosts allow =  127.0.0.1 10.1.1.0
   encrypt passwords = true

   domain master = yes
   domain logons = yes
   debug level = 8
   local master = yes
   preferred master = yes
   os level = 64

#   logon path = \\%N\profiles\%u
    logon path #   For nt/2000 clients
#    logon drive #   for 9x/me clients
#    logon home = H:

   logon script = logon.bat
   add user script = /usr/sbin/useradd -d /dev/null -g 1001 -s 
/bin/false -M %u

   keep alive = 30
   wins support = yes
#  wins server = 10.0.0.2
   unix password sync = yes
   unix extensions = yes
   security = user
   server string = %h server (Samba %v)
#   socket options = IPTOS_LOWDELAY TCP_NODELAY SO_SNDBUF=4096 
SO_RCVBUF=4096
   socket options = TCP_NODELAY
   preserve case = yes
   short preserve case = yes
   create mode = 0777
   directory mode = 0777
   interfaces = 192.168.0.69
#   remote announce = 10.0.0.255/

#   unix character set = ISO8859-1
    character set = ISO8859-1
#    unix charset = ISO8859-1
    client code page = 850
   # getwd cache = no
#   level2 oplocks = no


; necessary share for domain controller
[netlogon]
    path = /home/netlogon
    writeable = no
    write list = ntadmin
----------------- END SMB.CONF -------------------------
--------------------SMBCLIENT----------------

[root]:> smbclient -L //u-03 -U fernanda -d4
(....)
pm_process() returned Yes
added interface ip=192.168.0.69 bcast=192.168.0.255 nmask=255.255.255.0
Client started (version 2.2.7a).
resolve_lmhosts: Attempting lmhosts lookup for name u-03<0x20>
startlmhosts: Can't open lmhosts file /etc/samba/lmhosts. Error was No 
such file or directory
resolve_hosts: Attempting host lookup for name u-03<0x20>
resolve_wins: Attempting wins lookup for name u-03<0x20>
resolve_wins: WINS server == <127.0.0.1>
bind succeeded on port 0
nmb packet from 127.0.0.1(137) header: id=10293 opcode=Query(0) response=Yes
    header: flags: bcast=No rec_avail=Yes rec_des=Yes trunc=No auth=Yes
    header: rcode=3 qdcount=0 ancount=1 nscount=0 arcount=0
    answers: nmb_name=U-03<20> rr_type=32 rr_class=1 ttl=0
Negative name query response, rcode 0x03: The name requested does not exist.
name_resolve_bcast: Attempting broadcast lookup for name u-03<0x20>
bind succeeded on port 0
nmb packet from 192.168.0.45(137) header: id=21842 opcode=Query(0) 
response=Yes
    header: flags: bcast=No rec_avail=No rec_des=Yes trunc=No auth=Yes
    header: rcode=0 qdcount=0 ancount=1 nscount=0 arcount=0
    answers: nmb_name=U-03<20> rr_type=32 rr_class=1 ttl=300000
    answers   0 char @....-   hex 4000C0A8002D
Got a positive name query response from 192.168.0.45 ( 192.168.0.45 )
Connecting to 192.168.0.45 at port 139
 session request ok
Password:
session setup failed: NT_STATUS_LOGON_FAILURE
-------------END SMBCLIENT---------------------------------