unique overlay

hi,

i want to use unique overlay with the following config: objectClass: olcOverlayConfig objectClass: olcUniqueConfig olcOverlay: {6}unique olcUniqueURI: ldap:///ou=People,dc=abc,dc=net?mailLocalAddress,mail,uidNumber?sub olcUniqueURI: ldap:///ou=Groups,dc=abc,dc=net?gid?one

the attribute uniqueness for the people tree's uri works, but not the one for the group tree.

i found out the when i do an ldapsearch for a group and filter for gid=xy i get an empty result ldapsearch -Y EXTERNAL -b 'ou=Groups,dc=abc,dc=net' 'gid=32011'

the log file says: conn=18817 op=1 SRCH base="ou=Groups,dc=abc,dc=net" scope=2 deref=0 filter="(?gid=32011)"

why is the filter ?gid=32011 could this be the problem?

thanks for any hint. /chris