|The error means you are not actually talking to your ISP's servers. Your IP address verifies this.|
Try in this order:
1. Temporarily disable your software firewall (ie: Norton, McAfee, etc.) Then plug in the cable. If Internet works, your firewall settings are wrong.
2. Reset/power off and on your modem.
3. Ask your ISP if they have a MAC address-to-IP assignment policy. That means they only allow one registered computer to work on the Internet unless you re-register the other. NOT convenient in this case - get a router.