Need help to change ldap password from client side

*Dear All, I've recently configured a LDAP Server, I am facing a small problem when i'm trying to change my password from client side by giving the command "passwd". It is giving the following error in terminal Changing password for user ****. Enter login(LDAP) password: New password: Retype new password: LDAP password information update failed: Insufficient access passwd: Authentication token manipulation error Also in /var/log/messages it is showing the following error message Jan 24 15:43:57 mail passwd: pam_ldap: ldap_modify_s Insufficient access Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: gck_module_new: assertion `funcs' failed Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: module_instances: assertion `module' failed Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: egg_error_message: assertion `error' failed Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: couldn't find secret store module: (unknown) Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: lookup_login_keyring: assertion `GCK_IS_SESSION (session)' failed Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: create_credential: assertion `GCK_IS_SESSION (session)' failed Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: egg_error_message: assertion `error' failed Jan 24 15:43:57 mail gnome-keyring-daemon[6329]: couldn't create new login credential: (unknown) Also this is my ACL configuration details of /etc/openldap/slapd.conf access to attr=userPassword by anonymous auth by self write by * none access to * by * read Please help to resolve this Cordially Shiv *