Hopin there's a simple solution for this problem i'm having. I just bought a wireless router (Linksys WRT310N) but I'm havin trouble turning on Airport. I go to apple->Network->Airport and click the Turn Airport On button but nothing happens. I go to the cone shaped Airport icon on the taskbar upper right and it says No Airport Card Installed?? I have the 2.8 GHz 24" iMac which is supposed to come with an Airport card, i think. Does anyone know how to get my wireless connection going? thanks. btw the wireless router works on other comps.