Login Problems

This is an interesting one.

Now we have an app ,in which most of the users can log in but only 2 or 3 cannot.

The probelm is we have used a redirect url in the "sicf".

in which there is a class

( interface : CL_BSP_LOGIN_HANDLER ) for the login page.

This class has a method "login_processing" in which the foll. statement was there

application->bsp_client = '310'.

Now after removing this statement the problem occurs .

This is user specific !

Does anyone know how to set this parameter bsp_client without the hardcoding fro a particular user ?