Ethernet shield

garus,

Check your computers IP as PaulS advices. Go to windows "Command prompt" and type "ipconfig". You should see three main things:

  1. IP address, typically, behind firewalled home network; 192.168.x.xxx or 10.x.x.x
  2. Subnet mask, typically; 255.255.255.0
  3. Gateway, follows the IP address, same subnet, 192.168.1.1.

When you have found the subnet ex. 192.168.x.x, you can try to find free IP address for your ethernet shield by using the ping-command.
Try in command prompt; "ping 192.168.1.10", for example. If that is free at the moment, you won't get reply from any computer, and you can try it with your shield.

Kari