Macbook, Windows PC, DSL and a Linksys router-Help!?

I have reset my modem and router to factory settings. Both computers (Mac and PC) are set to automatically connect wirelessly. I don't have any passwords, firewalls or anything in place on either computer. Both laptops recognize and connect to the router, but I can not pull up any internet sites. My modem is also working because if I connect directly using an ethernet cable, I can surf. Suggestions on how to connect wirelessly? Setting I am missing? Is it an IP address problem? Thank you!

2010-07-09T21:46:44Z

How to dial the modem? Explain please?

2010-07-09T21:47:20Z

Oh and I don't have any password/userID settings on my ATT DSL account......

?2016-11-08T08:16:16Z

I dont think of of so... I actually have a similar router, im analyzing on the instant G, 2.4 GHz, USB community Adapter/reciver. And it says: Designed for Microsoft Winodows XP.... stumble on one that declares mac i might wager. or ask the persons ware you obtain it.