I believe, like myself that some people are having probs connecting
Some iPhones to stream music.
Apparently there is a problem with the airplay icon not appearing in bottom right hand corner
of music player. There are a lot of cheesed off people out there trying
to sync to various speakers etc.
one solution is to change the language on yr phone to something different
Lets say French, then the icon appears. Then change back again to English.
Didn't work for me but has for many others.
Google will help you with more info.