Have you installed the ISP software on your laptop? If not, do so now..
Firstly, try this. TURN EVERYTHING OFF! Modem, router, pc and laptop.
Turn the modem on, and when the lights have settled down (after 30 seconds or so), turn the router on. Wait a minute. Turn the laptop on - DO NOT TURN THE PC ON.
If that does not work -
Reset the router to factory settings.
TURN EVERYTHING OFF! The modem, the router, the pc and the laptop.
Follow the installation instructions, but connect both the pc and the laptop to the router by wire. You need only set up on the pc, and it should automatically set up the laptop.
THIRD OPTION:
If your pc is close to the modem, consider connecting directly to the modem by wire, and using the router only for the laptop. Set the laptop up by wire, as you did for the pc.
BUT this way, you will only be able to be online with one machine at a time, and will not be able to network them.
By the way, I had to turn my Zone Alarm firewall down from high security to medium security.
Your laptop should be g - but you can set it to mixed if you wish.