samba - Sep 2004 - Trust

Dear All, 
I want to make a trust between to Samba domains. I make all as is writed in
samba  documentation. But I alwais get a fail message when I want enstablish a
trust.

My steps:
Trusting domain is DOMA
Trusted domain is DOMB
1.  In trusted domain I create a unix user DOMA$
2.  In trusted domain I create a samba user:
              smbpasswd -a -i DOMA
3.  After then I trying create a trust from trusting domain with tjis command
        net rpc trustdom establish DOMB

But I get an error Couldn't verify domain account. Error was
NT_STATUS_CANT_ACCESS_DOMAIN_INFO.

I don't know where is a fail.

Thanks, Sopik Brona