title: Custom push notification sound( .wav ) file is not playing in ios7
body: <blockquote>
    <p>aps ={ alert = "push message"; badge = 1; id = 557; sound =
    "seller.wav"; type = 107; };</p>
  </blockquote>
  
  <p>Though i have added "seller.wav" file in my bundle I could not able to play custom sound,when push comes.</p>
  
  <p>Help me to get this solve.</p>
  
  <p>Thanks in advance.</p>