Wireless light is on but when I bring in my laptop

Turn the router off, and unplug the AC power.
Turn the router on, and wait until the lamps show that it's fully ready.

Be sure that you have _not_ disabled your laptop's wireless networking.
On your laptop, click to "view available networks".
Does the router's "SSID" show up in the output?

Connect an Ethernet cable between the Ethernet-port on the router and the Ethernet-adapter on your laptop.

Click Start
Click Run
Type 'cmd' and press ENTER.
In the "black" window, enter 'IPCONFIG'.
Find the line showing the IP-address of the "Gateway", probably something like '192.168.xxx.yyy'.
Start your web-browser, and enter: http://192.168.xxx.yyy
to connect to the router's web-interface.
Click to run the "Wireless Network Setup Wizard".
The router should restart.
Disconnect the Ethernet cable.
Repeat the "Show available wireless networks".

Or, try some other wireless-ready laptop or wireless-ready iPod Touch, to see if these devices can "see" your router's SSID.