Hi friend: Now I have written a CMP EJB and I want deploy this Bean to JBOSS-2.2.2. I want to execute some simple database process by it. I guess maybe I will setting the datbase source before I run the client program. My database is Oracle 8i. Please told me my guess is right. If right where shall I setting and what shall I write. Please tell me detail because I am a newbie in J2ee. Thank you very much!