Server side login identity

Hi,

I created a custom login module. On the client side(this is java command line program) the user is authenticated using the login() method of the custom login module.

Now it invokes the session bean and when the method getCallerPrincipal is called it is "Guest".

Where is this identity set.

How I can make the client logon to the server using the identity it authenticated?

thanks a lot

Padmaja Ragavendra