Playing random sound in array

Hey guys,

I'm new to AS3, still learning. I just read a little about arrays in the book I was learning from, and after looking at some online stuff, thought I'd try to do something simple with one.

What I'm trying to do is save a bunch of sounds (different dog barks) in an array and then when I press the button, it plays a random sound from that array. Here's what I have so far :

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package

{

          import flash.media.Sound;

          import flash.media.SoundChannel;

          import flash.events.MouseEvent;

          import flash.display.MovieClip;

          public class Sound2 extends MovieClip

          {

                    var bark1:Bark1;

                    var bark2:Bark2;

                    var bark3:Bark3;

                    var bark4:Bark4;

                    var bark5:Bark5;

                    var bark6:Bark6;

                    var soundChannel:SoundChannel;

                    var barkArray:Array = [Bark1, Bark2, Bark3, Bark4, Bark5, Bark6];

                    public function Sound2()

                              {

                              barkButton.addEventListener(MouseEvent.CLICK, onBarkButtonClick);

                              bark1 = new Bark1();

                              bark2 = new Bark2();

                              bark3 = new Bark3();

                              bark4 = new Bark4();

                              bark5 = new Bark5();

                              bark6 = new Bark6();

                              soundChannel = new SoundChannel();

                              function onBarkButtonClick(event:MouseEvent):void

                              {

                                        var barkNo = Math.round(Math.random() * 5);

                                        soundChannel = (barkArray[barkNo]).play();

                              }

                    }

          }

}

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When I try to press the button, I get this error message :

TypeError: Error #1006: play is not a function.

          at MethodInfo-22()

I used trace and saw the numbers from barkNo were fine, I think it's just something about the array. I've also spent a few hours trying to do it different ways, but still nothing. How can I play a random sound from an array? And am I storing the information correctly? I'm not sure what I'm missing, any help would be great.

Thanks