Robertson,
I don't think I'm making confusion, maybe the naming of the software is confusing, because I downloaded and installed adbindproxy Express to join my Linux machines to Samba AD, and when I #adinfo -v it show adinfo (CentrifyDC 5.5.1-400), as you can see it shows CentrifyDC, but I installed adbindproxy.
ADbindproxy joined my Linux client PC to the Samba AD, and after that I can login with my domain users.
I'm not using CentrifyDC as my Active Directory Service.
As I said in my first msg, I'm having problem to login with some users in some PCs. For exemple:
user1 can login to pc1 and can't login to pc2 and user2 can't login to pc1 and can login to pc2.