OpenLDAP + Kerberos +smbldap-tools

[Luciano Bolonheis]

Hi,
i'm beginning to use kerberos, and I have to make it work with Samba and LDAP.
I'm trying to use smbldap-tools from Idealx to add my users in LDAP database.
But when I try to add something with it, i get a answer: "err=8
text=modifications require authentication".
Do someone know what is it? 
in my slapd.conf: rootdn=cn=Manager,ou=mga,ou=prpr,o=mpf 
                          rootpw={KERBEROS}ldapadm at MGA.PRPR.MPF.GOV.BR

the ticket to ldapadm is valid

what else should be done?

thanks
Luciano Bolonheis