Sound issue that won't die!

(AS1.0 FP 6.0) This code didn’t work:

bang= new Sound(this);
bang.attachSound(“bang_id”);
bang.setVolume(80);
bang.start();

So I tried putting in a function:

theGame.prototype.playSound = function(id){
sound_snd= new Sound(this);
sound_snd.attachSound(id);
//sound_snd.setVolume(80);
sound_snd.start();
}

Still doesn’t work…I’ve checked system volume, made sure my sound file was named correctly and exported and do not know what to try next. The sound is typically called in a function call, because I want it to play on a collision