[firebird-support] Mapping Windows group to FB role

[liviuslivius liviusliv...@poczta.onet.pl [firebird-support]]

Hi,
can someone point me how can i map windows group to the Firebird role?I have 
tried already
CREATE MAPPING TRUSTED_WSZYSCY USING PLUGIN WIN_SSPI FROM predefined_group 
'rFirebird-Firebird-DBRido-ReadWrite' TO ROLE WSZYSCY
I have also tested with prefix xcorp\rFirebird... mapping was created but this 
not work for me. 
Can someone help?
Regards,Karol Bieniaszewski