SAMBA 4 - kerberos. -- error

[Pitchumani Krish]

Your question "Is this Samba3 or Samba4?  Have you been able to connect any other clients to that domain?  Can you verify if the machine account was created?" 

Its samba4, fresh installation, try to connect the first client which had the problem.

Machine account means client or server?  will it be possible for you guide me how to check this. 

thanks
K.Pitchumani