problem making a copy of ldap

Hi guys

I'm making a openldap slave server of my PDC server and I installed ubuntu 9.04 with openldap 2.4.15. I just copy /etc/ldap/ and I check it, but fails when starts. Logs (syslog) said:

slapd[30344]: @(#) $OpenLDAP: slapd 2.4.15 (Jul 30 2010 00:41:48) $ ^Ibuildd@palmer:/build/buildd/openldap-2.4.15/debian/build/servers/slapd slapd[30344]: config error processing olcOverlay={0}syncprov,olcDatabase={0}config,cn=config: slapd[30344]: slapd stopped. slapd[30344]: connections_destroy: nothing to destroy.

I check all permissions and are the same of my PDC server. Any guide to make it correctly?

Thanks And best Regards