I need help -- my current internet setup at home is wireless from ATT. I have a modem the is hooked up to a LINKSYS wireless B 2.4 GHz broadband router. The router is old and sometimes doesn't work so I went to the apple store a bought an Airport Extreme 802.11 Wi-Fi. Last night I couldn't get it to work so today I took it to the Apple Store and had the unit checked out. Everything was fine and it was able to connect to the internet. I brought the unit home and went through Airport Utility steps. The green light came on the airport extreme and I had 4 bars in the menu bar. But, my computer would still not connect to the internet. When I hook it back up the the LINKSYS router everything is fine. Anybody have any ideas? Thanks