[Zope-dev] Developing plugins for PluggableAuthService

I just made a very neat plugin for PAS. I added it and activated it for everything it can do. It is now the *only* plugin active for Extraction, Challenge and Reset Credentials. The problem is howvere, that nothing happens. None of the methods in the plugin gets called, ever! So, eh, has anybody else here written plugins for PAS so they can point me in the right direction? //Lennart