I need to move my dhcp server from one DC to another. I tried today by going into dhcp and running a backup, and then on the new one opening dhcp and running an import. After this I authorized the new machine and deauthorized the old one. After this my machines could not obtain an IP address. Am I missing a step? Do I need to update something or stop the service on the old server? I thought that was all i needed to do. Please help.