Sessionid creation problem

[Sundar_R]

I am creating my own sessionid by implementing sessionidmanager class's createsessionid method. In the validate method if i return false,it throws an error in the browser saying that session is invalid. But i want to recreate a new sessionid, how do we call the createsessionid method again ? explicitly calling createsessionid method from the validate method deosnt work. Please help me :((