access control: <who>=domain

I have install OpenLDAP 2.0.23 on a Linux RH7.2 machine
with the following command line:
configure --prefix=/usr/local/OpenLDAP --enable-dnssrv

The OpenLDAP slapd server works well but I can't put
access control command like:
access to * by domain=".*\.in2p3\.fr" read

The server starts but I can't read anythings on its...

Here after the log message:
May 13 14:07:17 xxx slapd[6794]: <= check a_domain_pat: .*.in2p3.fr
May 13 14:07:17 xxx slapd[6794]: <= acl_mask: no more <who> clauses,
returning
=n (stop)
May 13 14:07:17 xxx slapd[6794]: => access_allowed: read access denied by =n

Thanks for help