When I "obtain an IP Address automatically" My network connection works fine. When I manually set the IP Address (Subnet, gateway, DNS) The network connection does not work. (Internet explorer does not work. Ping to Gateway either times out or the Host <local IP Address> reports that the destination is unreachable.) If I use the same IP setting on a WinXP machine, the connection is fine. I have tried disabling the windows firewall with not apparent difference in behavior. Any suggestions?

By chance is your xp machine currently using the ip that you are trying to assign to your server if so this is why the internet does not work. Barrie Web Hosting and Web Design Barrie

I have five static addresses from my provider. Before adding this 2008 server I am using two. (One thru a Win2k3 Server and one XP). When I was unable to use one of my other IP addresses, I tried using The XP machine on the IP addresses I'd reserved for my 2k8 Server. The XP Machine worked. After switching back I tried the Win2K8 Server. It did not work with the static address. It works with a DCHP address.

you could try turning off and then turning on your router/firewall. Or get into the configuration page of the router/firewall and look at the security logs.

Might turn off ipv6 in server. See results of ipconfig /all for xp and server. Compare the two. Playing to the angels Les Paul (1915-2009)