LoginModule JAAS and Tomcat (initialize method is not called)

[Vincent Delhommois]

Hello,
I developped my own LoginModule which is very simple for the moment. I wanted 
to know if I have to create the JAAS configuration file ? If yes where you I 
locate it ?
When I start Tomcat, the constructor of the LoginModule is well called but 
Tomcat failed before the initialize method. Tomcat launch an exception : 
"Arguments type error".
Do you have any idea ?
Thanks for all !!