[Samba] Trust between two samba domains

[Šopík Bronislav]

I have a problem with Samba:
 
I want to make trust between two Samba domains. I have setup the trust on
the DOMAINB server then on the Samba DOMAINA server  "net rpc
trustdom establish DOMAINB"  I then get the following:
 
Password:     [entered password]
Could not connect to server SERVERB    [this is the PDC for the DOMAINB domain]
Trust to domain DOMAINB established
 
When I then try to logon to the DOMAINB domain from XP computers in
DOMAINA domain, I always get a fail with bad password.

it is my project in the school, I need to create this trust between two
domains.
 My smb.conf are follow:
In servera:
[global]
   workgroup = DOMAINA
   netbios name = SERVERA
   security = DOMAIN
   encrypt passwords = yes
   local master = yes
   domain logons = yes
   os level = 33
   domain master = yes
   preferred master = yes
   dns proxy = no
   log level = 3
 allow trusted domains = yes

[netlogon]
   comment = Network Logon Service
   path = /home/samba/netlogon
   guest ok = yes

serverb>
[global]
   workgroup = DOMAINB
   netbios name = SERVERB
   security = DOMAIN
   encrypt passwords = yes
   local master = yes
   domain logons = yes
   os level = 33
   domain master = yes
   preferred master = yes
   dns proxy = no
   log level = 3
 allow trusted domains = yes

[netlogon]
   comment = Network Logon Service
   path = /home/samba/netlogon
   guest ok = yes

IPaddresses are:
servera 192.168.100.10
serverb 192.168.100.11

Can you help me please?

Best regards