D500 Bluetooth Stereo Headset question
 

Hi I bought a Samsung Bluetooth Stereo headset for the D500 and it is supposed to work so that when I play mp3 files, the sound should be played on the headset, not the speaker. But When I play the mp3s, it just plays on the speaker.. I'm sure It should work since I've seen people use the same headset over at korea with the same phone. The user's manual says the phone needs "audio transfer profile" to allow this ability. Does anyone know whether this is a software issue? Thx in advance for any kind answers