Using triggers to play sound

//-----------------------------------------------------------------------------
// Torque Game Engine 
// Copyright (C) GarageGames.com, Inc.
//-----------------------------------------------------------------------------
 //Modified by MikeR
//-----------------------------------------------------------------------------
 //my sound for this trigger
  new AudioProfile(WaterSplashSound)
{
   filename = "~/data/sound/water1.ogg";
   description = "AudioSoftLooping2D";
	preload = true;
};
 //my function for playing this sound


//-----------------------------------------------------------------------------
// DefaultTrigger is used by the mission editor.  This is also an example
// of trigger methods and callbacks.

datablock TriggerData(waterSoundTrigger)
{
   // The period is value is used to control how often the console
   // onTriggerTick callback is called while there are any objects
   // in the trigger.  The default value is 100 MS.
   tickPeriodMS = 100;

};


//-----------------------------------------------------------------------------

function waterSoundTrigger::onEnterTrigger(%this,%trigger,%obj)
{
   // This method is called whenever an object enters the %trigger
   // area, the object is passed as %obj.  The default onEnterTrigger
   // method (in the C++ code) invokes the ::onTrigger(%trigger,1) method on
   // every object (whatever it's type) in the same group as the trigger.
   Parent::onEnterTrigger(%this,%trigger,%obj);
   
  $MusicHandle =alxPlay(WaterSplashSound);
    echo("\nEntering waterSound trigger area");
}

function waterSoundTrigger::onLeaveTrigger(%this,%trigger,%obj)
{
   // This method is called whenever an object leaves the %trigger
   // area, the object is passed as %obj.  The default onLeaveTrigger
   // method (in the C++ code) invokes the ::onTrigger(%trigger,0) method on
   // every object (whatever it's type) in the same group as the trigger.
   Parent::onLeaveTrigger(%this,%trigger,%obj);
   
   alxStop ($MusicHandle );
    echo("\nExiting waterSound trigger area");
}

function waterSoundTrigger::onTickTrigger(%this,%trigger)
{
   // This method is called every tickPerioMS, as long as any
   // objects intersect the trigger. The default onTriggerTick
   // method (in the C++ code) invokes the ::onTriggerTick(%trigger) method on
   // every object (whatever it's type) in the same group as the trigger.

   // You can iterate through the objects in the list by using these
   // methods:
   //    %this.getNumObjects();
   //    %this.getObject(n);
   Parent::onTickTrigger(%this,%trigger);
}