calling a sound thru a behavior

HI I had posted ealier about producing, managing sound in games and had made it work. however i have made some new code and the trigger works, on collision. but the audio won't play.


i have a behaviorfield set up so that when the object is triggered, it

alxPlay(%this,sound)
///where %this.sound is a string, in a behaviorfield.

this.sound, string is defined as

new AudioProfile(bkgLoop1)
{
   filename = "~/data/audio/music/bkgLoop1.wav";
   description = "AudioLooping";
   preload = false;
};

///and
///looping as
new AudioDescription(AudioLooping)
{
   volume = 1.0;
   isLooping = true;
   isStreaming = true;
   is3D = false;
 };

audio.cs is called in game.cs
What could I be doing wrong?
myfiles are wav and there etc. :::)))