try removing the network from your advanced wireless settings, and then as keezel stated, making sure that your router is broadcasting the SSID. I've had issues with my wireless card halfway connecting to a network, where it'd pull an IP but not be connected to anything (in this case the wireless icon blinks-only the computer, but the waves don't blink at all--weird) that was only solved with a reboot. You might want to try resetting your router to its defaults to see if its not a problem with the router, just to rule the router out completely since you could have set up your computers differently than how you set up your laptop.