I've just installed IReal Pro for the first time. I can play over the macbook speakers, but when I try Airplay to my stereo nothing happens. I can play this way via itunes, so I do have a connection. When I play from IReal Pro, it shows the connection and lets me use it (and turns off the sound on my macbook). When this is happening itunes tells me that my airplay connection is in use. However, no sound.