Windows logins disabled

We have windows authentication enabled on the server running C/SIDE. All clients are using Windows authentications but the menu item “Windows Logins” disabled. On the Server (where we have a client installed) the menu item is enabled. The clients are running W98 and are all members of the same domain as the server which is a W2K SP2. Anyone who has a clue why we can’t access Windows Logins on the clients? //Lars

then server user is a member of navision’s user?

Could You please explain a little more. //Lars