I have a old server that used to be the Windows 2000 DC on our old network. New network on Windows 2003 Standard edition R2 has new name. I have now upgraded the old box to Windows 2003 Standard edition R2 and want to first add it as a member server to the network then give it a role so it can act as the Sophos Enterprise Manager and WDS. It's still showing itself as the DC of the old network. How do I make the change please?