I can't seem to get music from the iPod app on my iPhone 4S (latest version of iOS 5) to play on my bluetooth headset. I did get this to work several weeks ago after which I never used my bluetooth headset. I can hear phone calls fine but not music. There used to be a little box with a triangle in it in the iPod app for selecting the audio output source but this no longer appears in the iPod app. As mentioned previously, I have gotten this to work but now it doesn't work. Any idea how to fix this? Suggestions are greatly appreciated.