My connection no longer starts up automatically with the computer, and also it drops if I don't actually use it (to get email or move from webpage to webpage, say) for 10 minutes or so. This is the way it's set up: PowerBook G4 connected wirelessly to an AirPort, which is itself connected (a) by ethernet to the POE (power over ethernet) box going to my wireless broadband antenna on the roof, itself connected to the Guinness node in Dublin; (b) by USB to my HP 1200 LaserJet printer, (c) by the speaker cable to my old Apple speakers. It used to be that when I switched on the computer, it automatically searched for my broadband connection on the AirPort and found it. Now I have to click on the AirPort icon on the menu bar and check the name of the AirPort connection. Use Interference Robustness is checked; it does the same, though, with it or without it. The only workaround I've found for it dropping is to leave iTunes playing all the time. Is there anything I haven't checked that I should have, or have checked that I shouldn't have?