ACL problem in OpenLDAP

Dear list,

I am really fade up and need your kind guidance to solve the problem.

I have OpenLDAP based addressbook. Users are located under ou=users,virtualDomain=kolkata.opendingo.com,dc=suse,dc=ldap

basedn of personal adresbook ou=personal,ou=contacts,ou=contacts,virtualDomain=kolkata.opendingo.com,dc=suse,dc=ldap

I need such an ACL so that only owner can read his addressbook.

The ACL for this is

access to dn.regex="cn=([^,]+),ou=personal,ou=contacts,ou=contacts,virtualDomain=([^,]+),dc=suse,dc=ldap$" by dn.regex="uid=([^,]+),ou=users,virtualDomain=$2,dc=suse,dc=ldap" read by users none

but all the users can see others personal addresbook. Kindly suggest where I have done mistake. thanks for your kind support