samba - Sep 2004 - Samba(PDC) - LDAP problem only with W2KAS and XP clients

Hi, my name is Gonzalo, I have the following problem: 

I have a Samba 2.2.8a configured as a PDC server?running on Solaris 9 and
pointing to a users database acceded by LDAP (SunOne Directory Server 5.2).

Everything works very well while I register hosts with W2000 Proffesional in the
Domain.

?

The problem appears when I want to join the domain with WXP or W2K AS?hosts (I
didn't? prove with W2000S but I supposed It'll be the same).?

The registration process into the domain looks to work fine but it does not,
Windows shows "Wellcome to MYDOMAIN Domain", when I restart the PC and
want to?start a session with a domain user, the W2K Server o WXP shows the next
message:

? 

"The system cannot begin its session at this time because domain?MYDOMAIN
not this available"

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or something like that...

?

In the log of the samba I've found that during the registration to the
domain, the following error is reported:

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[2004/08/15 18:53:45, 2] rpc_parse/parse_samr.c:samr_io_userinfo_ctr(6285)
?samr_io_userinfo_ctr: unknown switch level 0x1a
[2004/08/15 18:53:45, 0] rpc_server/srv_samr.c:api_samr_set_userinfo(670)
?api_samr_set_userinfo: Unable to unmarshall SAMR_Q_SET_USERINFO.

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I don't know if this could help but hers is a copy of my smb.conf file
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[global]
workgroup =?MYDOMAIN
netbios name =?MAIN
server string = Samba PDC Server
interfaces = 192.168.104.1/24 
bind interfaces only = Yes
encrypt passwords = Yes
passwd program = /opt/samba/bin/change_LDAP_passwd.sh %u
passwd chat = *New*Password:* %n\n *Re-enter*new*Password:* %n\n *changed*
unix password sync = Yes
log level = 2
log file = /opt/local/samba/var/log.%m
max log size = 50
domain admin group =?smbadm
domain logons = Yes
os level = 80
preferred master = Yes
domain master = Yes
dns proxy = No
wins support = Yes
ldap server = 192.168.1.1
ldap port = 389
ldap suffix = o=myorg,o=root
ldap admin dn = uid=admin,ou=People,o=myorg,o=root
ldap ssl = no
hosts allow = 192.168.1.0/255.255.255.0 
profile acls = Yes
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[homes]
comment = Home Directories
valid users = %S
read only = No
browseable = No
?
[netlogon]
comment = Network Logon Service
path = /opt/samba/lib/netlogon
guest ok = Yes
share modes = No
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I can attach all the logs of the LDAP, if somebody thinks that they can help.
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if someone can help me, thanks in advance, Gonzalo.
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