I just purchased a Harman Kardon 1710 receiver with built in airplay. Everything works great, however the airplay feature does NOT work from IOS devices. Airplay however DOES work from iTunes on my macbook. I am using an Airport Extreme router. I have restored/reseted every device, and it still does not show airplay on my iOS devices command center. The receiver is on the network and connected. Any help is greatly appreciated.