Reject all calls from one or more Calling Station ID regardless of username or password

Hi guys, I am a quite new user of the Free Radius Server and i have a problem. I have an old Dial In system. I want to reject all calls from one or more Calling Station ID regardless of username or password. I have tried to edit the user file like this USERNAME Calling-Station-Id == 404402704, Auth-Type := Reject The line a bow is based on the username and that is not what I want, I want that all users from Callingstation ID 404402704 shall be rejected. Have you guys got some suggestion how to solve my problem? /Henrik