Have a Sonorix C3 Bluetooth headset with some nice stereo headphones attached. I can use it just fine with my computer to listen to music, and I've synced it to my iPhone 3GS to take calls. However, I can't for the life of me figure out how to play music on my iPhone 3GS so that I can hear it through the Sonorix. I've made sure the Sonorix is connected to the iPhone, and it works fine for calls, so what am I missing? Thanks in advance!