LDAP password information update failed: Insufficient access

[Paul bob <uask2009@gmail.com>]

I am experiencing a problem trying to configure a ldap server for
users authentication.
Basically, I am at a point where users can login properly, but they
can not change their password. Some info for troubleshooting:

slapd.conf access info

access to attr=userPassword
access to *
      by self write
      by users read
      by anonymous auth

I would appreciate your help!

Thanks,
bob