[Zope-dev] Zope's Transaction manager

Hello Zopistas. I want to register an object with the transaction manager. I have inherited from TM.py and overloaded tpc_finish and tpc_begin and it does not seem to work. They are never called. I have even tried registering the object with bobo_before, which I assume it is called before anything else. Does anyone have Tips/HowTo on how to make objects participate in Zope's transaction? After-all-Anthony-was-right Pavlos