We're using :
- JBoss 5
 - Flex SDK 3.5
 - BlazeDS 3, with integrated authentication (through JAAS and JBossSX)
 
Failed login are always indicated to the flex client by the same fault code : Client.Authentication
However, the underlying JAAS LoginModule throws a specific javax.security.auth.login.LoginException subclass.
How can we propagate the failed login reason to the flex client ?