Hey there, I have 2 Macs connected through AirPort Express which is unlocked at the moment. I'd like to add a password which I've tried doing in AirPort Utility and when I hit "Update" it says it will restart. Well a few minutes later I get an error asking me to make sure my AirPort Express is plugged in. The light is green but it won't show up as a connection anymore. I reset it and tried again with the same results. Any advise would be greatly appreciated.