service ldap start on CentOS fail to start
 

I configure CentOS 5.x Samba Domain Controller With LDAP Backend
but when I try to start ldap service it fail

and I try to run ./slapd -d 2
I get below output
Please Help

[root@datahouse sbin]# ./slapd -d 2
@(#) $OpenLDAP: slapd 2.3.43 (Mar 30 2011 19:59:52) $
mockbuild@builder10.centos.org:/builddir/build/BUILD/openldap-2.3.43/openldap-2.3.43/build-servers/servers/slapd
daemon: bind(7) failed errno=98 (Address already in use)
daemon: IPv6 socket() failed errno=97 (Address family not supported by protocol)
slapd stopped.
connections_destroy: nothing to destroy.
[root@datahouse sbin]#

"Address already in use" - it's already running.