Are you sure that your laptop is connecting to your network? If it is, then it will only add to the confusion, so verify that the connection is between your laptop and router.

Next, make sure that the router is set up properly. Most ISPs give you a dynamic IP address obtained via DHCP, so in the settings panel in the router configuration, make sure that IP address is DHCP (and there's usually no hostname needed). After setting everything to the settings provided by your ISP, make sure that the router shows everything alright under the WAN status page. If anything's amiss, double-check everything.

Once you're sure that your router is properly recieving and sending packets to your cable modem, you need to worry about the internal network. Ideally, the router should be assigning DHCP IP addresses to all the computers, and in the computer configuration, they should all be expecting it (NO static IP addresses).

Everything should be working by now. If you can't get the router to communicate properly to the cable modem, you should get your ISP's technical support, as you're paying for their Internet.

Hope this helps

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