I have a wireless connection through Time Capsule. After booting up my iMac I don't get an internet connection unless I manually stop & restart Airport (in the menu bar). Most of the time I have to do this twice to get a stable connection. (Strange thing is, I also get a connection when I just open the Airport menu item, but lose it when the item is closed again.) How can I resolve this? Could this possibly be connected to my keychain password, and can I just delete that? Thanks.