DbLink connection with SSPI authentication fails

Hello,

I have installed v9.2 on Windows XP and configured SSPI authentication for
a Windows user "Administrateur" in pg_hba.conf
Using psql or Pgadmin, authentication with the user "Administrateur" works
without problem.

However I couldn't create a connection using DbLink and the Windows user, I
tried the following queries but got always the same error.

Queries:

SELECT dblink_connect('host=localhost dbname=PortefeuilleValeurs
user=Administrateur')
SELECT dblink_connect('host=localhost dbname=PortefeuilleValeurs
user=Administrateur password=')
SELECT dblink_connect_u('host=localhost dbname=BdTest user=Administrateur')
SELECT dblink_connect_u('host=localhost dbname=BdTest user=Administrateur
password=')

Error Message:
ERREUR: could not establish connection
DETAIL: FATAL: authentification SSPI échouée pour l'utilisateur «
Administrateur »

********** Erreur **********
ERREUR: could not establish connection
État SQL :08001

Remark : Using "postgres" user, DbLink works.

Could anyone tell me how to configure SSPI authentication using DbLink ?

Thanks a lot !

--
Florent Mazzone