T5: Acegi integration

[Stephane Decleire]

I have just made the integration of Acegi in my T5 application but after 
each authentication attempt, i get the following error :

Error invoking service builder method 
org.apache.tapestry.hibernate.HibernateModule.build(HibernateSessionSource, 
ThreadCleanupHub) (at HibernateModule.java:74) (for service 
'HibernateSessionManager'): No service implements the interface 
org.apache.tapestry.ioc.services.ThreadCleanupHub.
any idea ?

Stephane