I got an AirPort Express and set up a wireless network (two hours of talking to Apple support in Bangalore and Cork, a weekend of sweating blood over it myself, finally got it done with the help of a little genius in my ISP). But now, for the first time since, I've plugged in my iPod's FireWire cable. iTunes didn't start up automatically, and worse, when I did start it, there was no sign of the iPod in its list of songs, library and so on. Nor is there any iPod listed in the Finder's window. Yet it's saying Do Not Disconnect. Before this, the iPod had stopped flashing up the "OK to disconnect" checkmark, since its last automatic software update. What is wrong, and how do I fix it?