I have an Airport Express which I have connected to a stereo receiver so I can play iTunes through it. My iMac is too far away from the Express to get a wireless signal so I want to connect the Mac to the Express through Ethernet (they're both on the same wired home network). Problem is that when I open Airport Utility it obviously sees no wireless Express and tries to rescan. Airport Utility doesn't give me an option to configure it to connect through Ethernet. Any suggestions?