Also have you update all the firmware for the router and or super g?
And you can try to add your wireless network (ssid/password, wep/wpa and maybe a mac address filtering etc.)
New Toshiba Sattelite A75 (loaded) laptop with the Atheros card (Super G) will not talk to my Linksys G speed router. Router works fine on an older Toshiba LP with a Linksys PCMCIA card, which is 5 months old. The Super G card and G router don't want to talk,no matter how I set it up. The laptop won't hold the lower speed, even when set up to the B speed.. it will just try to connect at the higher speed then bump itself off. I'd like to know if anybody has heard of this and if so is there a work-around, or how can I disable the Atheros card and use my existing and perfectly fine Linksys card. Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic