Thanks for your answer.
If hibernate.cfg.xml is not mandatory, why I got that exception ?
Is there some jar related with hibernate that I missed to put in the server or in the .ear ?
Thanks for any help
So, Gavin, why is it happen? I have the same issue...
I really have no idea at all. Hundreds of people run the registration example without this happening. Start off again with a clean install of everything, and follow the instructions exactly.