Walking Player Version1.0 see below link to information you are using.
Cannot play music now in this non-phenomenon has not reviewed, but if try to restart the Player Walking if you encounter phenomena cannot be played as well as that try restarting iPhone turn off once(Standby, not power button press and hold and the according power off is)。
Music playback process is actually rather Walking Player process on may be required and initialization of the system processes to recover some sort of glitch is done on the system process.