Samba Client in Win2k Domain

[Eduardo de Moura Rodrigues]

Hi, 

I work in Brasil's goverment and here has a Microsoft Network, include 
authentication. My workstation is Fedora Core 2 with a Gnome, I install 
Samba and now I can see all Windows Network and Domain, but I can't join in 
there. I use winbind, Kerberos and I can't do it.
Ex. 

Here has a Win2k Network;
Has a domain named: "MME.gov.br"
I have a count in server: user: eduardo.rodrigues and password: xxxxxx
I use fedora Core 2 and Samba 3.2
And I want to be a member of MME domain 

Anybody knows what I do now?
Thanks