Ldap sasl gssapi

I have installed all packages required(openldap,kerberos,cyrus-sasl)
configured ldap.conf
but when i did ldapsearch -Y gssapi return

ldapsearch -Y gssapi -H ldap://ldapserver-d -1  cn=prova

it did

ldap_msgfree
ldap_err2string
ldap_sasl_interactive_bind_s: Unknown authentication method (-6)
        additional info: SASL(-4): no mechanism available: No worthy mechs found

What i miss?
Thanks