importing ldap database for a BDC

Hi list

Im preparing a BDC server using samba with ldap and I start to import the database. At first I commented and error with the suffix but not was the last of my problems, Im importing and appears:

<= str2entry: str2ad(sambaLogonTime): attribute type undefined slapadd: could not parse entry (line=81) _ 0.09% eta 01m elapsed none spd 64.8 k/s Closing DB...

What Im making bad?

First I copied all inside /etc/ldap/schema/ to the BDC, and I prepared with slapcat a bckup from PDC. I installed samba and copied smb.conf modifying the role. When I go to execute the slapadd -l backup.ldif appears the error. Any idea?

Thanks And Best Regards