You don't say which model iBook you have or what OS X and AirPort software versions you're using. But, assuming your iBook will work with the AirPort Extreme card and your software is up-to-date, I'd guess it isn't seated properly. It's surprisingly difficult to get them in all the way. On Feb 23, 2005, at 1:28 PM, Winston MacKelvie wrote: > Hi all. I bought a factory packaged Airport Express card for my G3 > iBook> It fits perfectly. It didn't work. I returned it (by mail) for > another. Same problem. It doesn't show up under Sys Profile under > Airport. No Sys Prefs appears. No Network set-up appears.