keywords "modulepath" and "moduleload" ignored?

Apr  8 11:45:45 authn2 slapd[18074]: /local/etc/openldap/slapd.conf:  
line 25: keyword <modulepath> ignored
Apr  8 11:45:45 authn2 slapd[18074]: /local/etc/openldap/slapd.conf:  
line 45: keyword <moduleload> ignored

Why would these be ignored and why would slapd not give more detail?

Thanks,

Paul

 From slapd.conf:
> #
> # See slapd.conf(5) for details on configuration options.
> # This file should NOT be world readable.
> #
> include        /local/etc/openldap/schema/core.schema
> include        /local/etc/openldap/schema/cosine.schema
> include        /local/etc/openldap/schema/inetorgperson.schema
> include        /local/etc/openldap/schema/nis.schema
> include        /local/etc/openldap/schema/samba.schema
>
> # Allow LDAPv2 client connections.  This is NOT the default.
> allow bind_v2
>
> # Do not enable referrals until AFTER you have a working directory
> # service AND an understanding of referrals.
> #referral ldap://root.openldap.org
>
> pidfile    /var/run/openldap/slapd.pid
> argsfile   /var/run/openldap/slapd.args
> #loglevel acl config conns filter packets sync
> #loglevel config sync
> loglevel -1
>
> # Load dynamic backend modules:
> modulepath     /local/pkg/openldap/lib
>
> # modules available in openldap-servers-overlays RPM package:
>
> # modules available in openldap-servers-overlays RPM package:
> # moduleload accesslog.la
> # moduleload auditlog.la
> # moduleload denyop.la
> # moduleload dyngroup.la
> # moduleload dynlist.la
> # moduleload lastmod.la
> # moduleload pcache.la
> # moduleload ppolicy.la
> # moduleload refint.la
> # moduleload retcode.la
> # moduleload rwm.la
> # moduleload smbk5pwd.la
> # moduleload syncprov.la
> # moduleload translucent.la
> # moduleload unique.la
> # moduleload valsort.la
>
> moduleload pw-kerberos.so