pressing play button on car bluetooth doesn't start music from my phone

[kimtaein1]

my htc8x is paired with my car. when i get in the car and press play button it doesn't play music. i have to go to xbox music and play a song and after doing that, i can control musics from my car.
is there a way to always understand 'play' command as 'play last played music'? iphone does this and i was surprised that windows phone doesn't do this

 

[CJ Thunder]

Is it still in the now playing section?