[Samba] (no subject)

[Sandy Napoles Umpierre]

hola......tengo un problema, tengo un controlador de dominio sobre 
windows server 2003, a la hora de adicionar un servidor linux ubuntu 
server 7.04 al dominio windows me da el siguiente error
Using short domain name -- ECCMG
Failed to set servicePrincipalNames. Please ensure that
the DNS domain of this server matches the AD domain,
Or rejoin with using Domain Admin credentials.
Disabled account for 'UBUNTU' in realm 'ECCMG.CUPET.CU'