I have Centos 4.1 Samba 3.0.2 adn LDAP for authentication. I will to make a Bidirectional-trustrelatioship between my LINUXPDC and a NT4-server. i make with the command "smbldap-useradd -i -w NT4-server" the local account on LINUXPDC, then with user manager on NT4-server i create the trust (trusting and trusted). NT4-says trust relationship successfully estabilished (for trusting domain)but LINUXPDC when i digit "net rpc trustdom establish NT4-server", i insert the password but he says: Could not contact BTSARSRV01(the name of NT4-server PDC) trust relatioship estabilished. What is the problem? Thanks for any help and excuse for my poor english Francesco