Installation of GUI Machine

Hi, I am trying to install GUI machine on a desktop (win 2000), I have the MSSqlserver already running on it. During the GUI machine installation it gives an error "Cannot Connect to DataBase", Error Log = Either the SQLserver is not available or access is denied.

As per the documentation of the server, the userid=ca, and password=null, the system is picking the Host name, Port and UserID automatically.

Appreciate some solution.

Rgds