I am trying to set up my Apple Airport Express to play through AirTunes, so I am not using it as a wireless router. I am trying to get it to join my current Wifi network (Verizon FIOS) and whenever I enter the network information and WEP key the Airport Utility on my Mac says that it configures the new device and is waiting for a restart. Then it never shows up on my Airport Utility or any other wireless network, and it doesn't show up in my iTunes for AirTunes. The only way to get it to show up again is to hit the reset button on the Airport Express.