Always getting j2ee_guest as logged in user

Hi All,

I am creating an application where I am supposed to get the user id which has logged into the portal. My code is as follows

IWDClientUser clientUser = WDClientUser.getCurrentUser();

               IUser user = clientUser.getSAPUser();

               eMailId = user.getEmail();

I am always getting the user as j2ee_guest no matter whoever has logged into the system. I am suprised why this is happening.

Plz help.

Regards

Nikhil Bansal