Playing mp3 files on rtmp server in AS3.0

1

private var audio:Sound;
audio = new Sound();
.
.
.
.
audio.load(new URLRequest(FILENAME));
audio.play();

while executing this code, i’m getting the following error.

  1. type was not found or was not a compile time constant.Sound
  2. call to a possibly undefined method Sound.
  3. call to a possibly undefined method URLRequest.