openldap sizelimit. Can't receive more than 500 entries

I can't receive more than 500 entries, when I query my openldap-server.

Although I made the following changes:

slapd.conf

    # This is the main slapd configuration file. See slapd.conf(5) for more
    # info on the configuration options.

    #######################################################################
    # Global Directives:       
    .....

     # The maximum number of entries that is returned for a search operation
    sizelimit 10000

ldap.conf

#
# LDAP Defaults
#

# See ldap.conf(5) for details
# This file should be world readable but not world writable.

#BASE   dc=example,dc=com
#URI    ldap://ldap.example.com ldap://ldap-master.example.com:666

SIZELIMIT       10000
#TIMELIMIT      15
#DEREF          never

# TLS certificates (needed for GnuTLS)
TLS_CACERT      /etc/ssl/certs/ca-certificates.crt

After restartin my machine, and query the following command:

ldapsearch -x -h localhost -b "dc=XXX,dc=XXX,dc=XXX"

I receive:

# search result
search: 2
result: 4 Size limit exceeded

# numResponses: 501
# numEntries: 500