OpenLDAP 2.1.23 / Monitor Backend

[Frank Thyes <thyes@gmx.net>]

Hello,
i have configured and populated my test ldapserver. Everything seems
to work as expect until i decide to use the monitor backend. Added 
'database monitor' and the ACL to my slapd.conf file and restartet 
slapd.

--->8===

database monitor

access to dn.subtree=cn=Monitor
  by dn.exact=cn=admin,dc=pilgerer,c=de write
  by dn.subtree=ou=People,dc=pilgerer,c=de read
  by * none

===8<---

Expecting some beautyfull statistics getting just...

ldapsearch -x -b "cn=monitor"
# extended LDIF
#
# LDAPv3
# base <cn=monitor> with scope sub
# filter: (objectclass=*)
# requesting: ALL
#

# search result
search: 2
result: 0 Success

# numResponses: 1

What i am missing? Could someone enlight me?

Best regards
Frank