no structural object class provided, pls help...

[Beast <beast@setuid.com>]

Hello,
What is the meaning of this error?

ldap_add: Object class violation (65)
        additional info: no structural object class provided

This is the ldif:

dn: uid=beast,ou=People,dc=jakarta,dc=mydom,dc=com
uid: beast
cn: Beauty and the beast
objectClass: top
#objectClass: account
objectClass: posixAccount
objectClass: shadowAccount
userPassword: {crypt}$1$BmLl3rNr$L9/H.JLtCxMpyLnuFqHsR/
shadowLastChange: 12074
shadowMax: 99999
shadowWarning: 7
loginShell: /bin/bash
uidNumber: 5000
gidNumber: 1000
homeDirectory: /home/beast

I'm sure that no entries or other objectclass are refering to "account"
objectclass.

BUT if i add "objectClass: account" without attribute of "userid" (which is
MUST) it will accept.
Tks.

PS:
Is there any (friendly :=) milist which i can ask this ldif/schema kind of
thing?