Hello Guys, I am doing one Container managed Entity bean in which i will check wheather it is valid user or not. But now I want to restrict the userlogin to one person only. ie- if someone tries with same name login while the same person is logged in, the other person should not allowed to login. & alsoif while login m/c shuts down suddenly, user should allow to get login. I have thought it through CMEB, but i didnot got any clue. But if i use Stateful Session Bean, then how i should mix it together. can anybody tell me ? please..