winbindd_priv dont exist

hi people, i doing my server number 50 with freeradius, always fails. in this case, i have configurate ntlm but when configure mschap i have error: Exec output: Reading winbind reply failed! (0xc0000001) Exec plaintext: Reading winbind reply failed! (0xc0000001) searching a solution, search the group but dont exist, i have the group freerad. i make chown to the folder winbindd_privileged and add the group freerad but nothing happend. what can i do? Regards