Does it show the same gateway as the server? Can you ping your ISPs server with both? If you can access the router but no internet, you may want to look at firewalls...windows and especially 3rd party ones.
So I've decided to run Cat5 Cables from my router to my server running Windows Server 2008 Enterprise (approx. 100 feet away). I also have a desktop computer running Windows XP Professional. My issue is that I can connect the Cat5 wire into my server and get internet, but when I connect the Cat5 wire into my desktop, it says "connected" but I do not receive internet. I've tried setting a static IP, which didn't work, and I've tried it on "obtain IP automatically". No matter what I do, it will not connect to the internet. Any help would be appreciated.