ldap SASL GSSAPI , unknown authorization mechanism

["Amir Saad" <Amir.Saad@bibalex.org>]

i use Fedora 4, ldap 2.3.11 , cyrus-sasl-2.1.19 , MIT Kerberos 5
i tried to run the command:
 ldapsearch -Y GSSAPI -b '' -s base '(objectclass=*)' namingContexts
but i got the following error:
        ldap_sasl_interactive_bind_s: Unknown authentication method (-6)
        additional info: SASL(-4): no mechanism available: No worthy mechs found
although i installed MIT Kerberos 5 then i installed the cyrus-sasl-2.1.19  and both installed successfully...
i hope u can help
thanks