Windows cannot connect to the group %s. If you are trying to connect to an Active Directory Domain Controller running Windows ...

Windows cannot connect to the group %s.  If you are trying to connect to an Active Directory Domain Controller running Windows 2000, verify that Windows 2000 Server Service Pack 3 or later is installed on the AD DC, or use the Windows 2000 administration tools. For more information about connecting to AD DCs running Windows 2000, see Help and Support.