[Samba] SAMBA 3 and Windows2000 mixed mode trust

[Giovanni Romanenghi]

I have one server windows2000 mixed mode with active directory and samba 
3.0 PDC.
This is my smb.conf
[global]
         workgroup = TESTIPLANET
         netbios name = TEST
         server string = DOMINIO TEST
         interfaces = 10.10.6.158
         bind interfaces only = yes
         preferred master = Yes
         domain master = Yes
         wins support = Yes
         domain logons = yes
         local master = yes
         encrypt passwords = yes
         security = user
         socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
         ldap suffix = o=test,c=it
         ldap machine suffix = ou=people,o=test,c=it
         ldap user suffix = ou=people,o=test,c=it
         ldap group suffix = ou=group
         ldap admin dn = uid=sambauser,cn=config
         ldap ssl = no
         passdb backend =  ldapsam:ldap://10.10.5.160/ guest
         passwd program = "/sambabin/samba/bin/ldapsync.pl -o %u"
         passwd chat = *New*password* %n\n *Retype*new*password* %n\n 
*modifying*
         unix password sync = Yes
         logon script = %G_%U.bat %G %U
         log level = 0
         logon home =
         logon path =
         admin users = @helpdesk
         min password length = 5
         wide links = no

I have create the trust account and the windows 2000 have trust samba 
without problem.
Second: on samba server : net rpc trustdom establish DOMAIN2K
it's  ok.
When I try test my trust on samba log I received this error:
[2003/10/20 12:35:36, 0] 
auth/auth_domain.c:connect_to_domain_password_server(115)
   connect_to_domain_password_server: unable to setup the NETLOGON 
credentials to machine SERVICEDC1. Error was : NT_STATUS_UNSUCCESSFUL.
[2003/10/20 12:35:36, 0] auth/auth_domain.c:domain_client_validate(167)
   domain_client_validate: Domain password server not available.

Any ideas?

Bye Giovanni