At my job, we have Windows 2000 Server and my boss wants to merge to 2003. Our technician brought us a 2003 server. I could switch for both server by change network cable and typing ipconfig /renew in DOS. When I left yesterday, I shutdown the 2003 Server and today, my computer can't find the server. I tried to ping it and it says "Unknown host name". What could be the problem? I can't call my technician cause he's not working on week-end!