Check out your IP Configration.

Drop to a DOS Prompt, or rather choose the Start Button, and then "Run" and then type in "CMD" and then hit enter.

Bingo:

c:\\Windows\\desktop\\>

Now type in:

ipconfig /all > myip.txt

Look at the myip.txt file, and then see what IP it has configured. If it is 192.168.0.2 with a Netmask of 255.255.255.0 and your server is 192.168.0.1 with a netmask of 255.255.255.0 then you are all set.

If your IP address does not look the same as the one on your server, it will not ping! You may have to set this manually. DHCP may not be working for some reason.

Good luck, tell us if the IP matches the same series as the one on the server, etc.