newbie problem w/ ldappadd

[openldap <openldap@8848.net>]

 hi all,

 i'm attempting to learn about opeldap, in order to setup a qmail-ldap
 mailserver.  i have slapd up and running, and i'm trying to add entries w/
 ldapadd.  relevant postion of my slapd.conf:

 ---------------------------------------------------
  
 database        ldbm
 suffix          "dc=mail,dc=hollybridge,dc=not"
 rootdn          "o=qmailusers,dc=mail,dc=hollybridge,dc=not"
include /usr/local/openldap/etc/openldap/slapd.oc.conf
include /usr/local/openldap/etc/openldap/slapd.at.conf

include /usr/local/openldap/etc/openldap/schema/core.schema
include /usr/local/openldap/etc/openldap/schema/corba.schema
include /usr/local/openldap/etc/openldap/schema/cosine.schema
include /usr/local/openldap/etc/openldap/schema/inetorgperson.schema
include /usr/local/openldap/etc/openldap/schema/java.schema
include /usr/local/openldap/etc/openldap/schema/krb5-kdc.schema
include /usr/local/openldap/etc/openldap/schema/misc.schema
include /usr/local/openldap/etc/openldap/schema/nadf.schema
include /usr/local/openldap/etc/openldap/schema/nis.schema
include /usr/local/openldap/etc/openldap/schema/openldap.schema

rootpw          secret
index   objectClass     eq


 ---------------------------------------------------

 i've got the following ldif:

 ---------------------------------------------------
dn: o=qmailusers,dc=mail,dc=hollybridge,dc=not
objectClass: top
objectClass: organization
objectClass: dcobject
dc: mail
#sn: hollybridge mail users
#cn: qmailusers
o: qmailusers

dn: cn=yjl,o=qmailusers,dc=mail,dc=hollybridge,dc=not
objectClass: top
objectClass: organization
objectClass: person
o: qmailusers
cn: yjl
sn: yin


 ---------------------------------------------------

 and i'm trying to add it like so:
[root@mail bin]# ldapadd -x -D "cn=qmailusers,dc=mail,dc=hollybridge,dc=not" -w secret -f example.ldif   -v
ldap_initialize( <DEFAULT> )
add objectClass:
        top
        organization
        dcobject
add dc:
        mail
add o:
        qmailusers
adding new entry "o=qmailusers,dc=mail,dc=hollybridge,dc=not "
ldap_add: No such object

ldif_record() = 32




 any ideas?