slapd and ldapsearch both include a "debuging" option. If
nothing is working, try starting slapd from the commandline with:

        /usr/sbin/slapd -d 3 -f /etc/openldap/slapd.conf


        Also, the way I found out I was generating the maps with the
wrong base was  `strings /tmp/*.dbb`. Crude, but enlightenting.