as3, XML, and Sound

[ballaby]

I am teaching myself as3 for my job through online tutorials. So far it has been going well, but I have hit a wall while dealing with playing different mp3 files that are defined in my XML. Currently in my XML I have some text, an image, and a sound file for each page. I am using a next and back button to go from page to page and change the content that is being displayed. I have gotten the images and text to work flawlessly but I am struggling with the audio. The first audio file is playing but when I hit the next button I get this error: "Error #2037: Functions called in incorrect sequence, or earlier call was unsuccessful." I am trying to get the audio file that is playing to change with the next and back buttons. I would greatly appreciate any help that someone could provide. Here is my as3 code so far:

package 
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.ProgressEvent;
    import flash.media.Sound;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.events.MouseEvent;
    import XMLList;
    import flash.display.Loader;
    
    public class Images extends MovieClip {
        
        public var xmlLoader:URLLoader = new URLLoader();
        public var xmlData:XML = new XML();
        public var index:int = 0;
        public var totalPages:int;
        public var pageNumber:int;
        public var imageLoader:Loader = new Loader();
        public var snd:Sound = new Sound();
    
        
        
        public function Images() {
            setupEvents();
        }
        
        public function setupEvents():void {
            xmlLoader.addEventListener(Event.COMPLETE, loadXML);            
            nextButton.addEventListener(MouseEvent.CLICK, nextPage);            
            backButton.addEventListener(MouseEvent.CLICK, backPage);            
            snd.addEventListener(Event.COMPLETE, soundPlay);            
            xmlLoader.load (new URLRequest("data/images.xml"))
        }
        
        public function loadXML(e:Event):void {
            xmlData = new XML(e.target.data);           
            totalPages = (xmlData.pic as XMLList).length();         
            trace(totalPages);          
            gotoPage(index);
        }
        
        public function soundPlay (e:Event):void {
            snd.play();
        }
        
        
        public function gotoPage(pageIndex:int):void {
            textBox.text = (xmlData.pic.text.text()[pageIndex]);
            headerTxt.text = (xmlData.pic.header.text()[pageIndex]);            
            trace(xmlData.pic.image[pageIndex]);            
            imageLoader.load(new URLRequest(xmlData.pic.image[pageIndex]));
            imageArea.addChild(imageLoader);
            snd.load(new URLRequest(xmlData.pic.audio[pageIndex])); 
        }
        
        public function nextPage(e:MouseEvent):void {
            index ++;
            index = index % totalPages;
            gotoPage(index);
        }
        
        public function backPage(e:MouseEvent):void {
            index --;
            index = (index + totalPages) % totalPages;
            gotoPage(index);
        }
        
        
    }   
}

And here is my XML:

<images>
	<pic>
		<header>Kresge</header>
		<text>This is an image with a building and some trees....Exciting!!!</text>
		<image>images/image01.jpg</image>
		<audio>audio/audio_01.mp3</audio>
	</pic>
	<pic>
		<header>Media Lab</header>
		<text>This looks tike the inside of a building but I am unsure what exactly is going on.</text>
		<image>images/image02.jpg</image>
		<audio>audio/audio_02.mp3</audio>
	</pic>
	<pic>
		<header>Stata Center</header>
		<text>Again, I have no idea what is going on in this image...but it showed up!!!</text>
		<image>images/image03.jpg</image>
		<audio>audio/audio_03.mp3</audio>
	</pic>
	<pic>
		<header>Stata Lobby</header>
		<text>This is the lobby of the Stata building.</text>
		<image>images/image04.jpg</image>
		<audio>audio/audio_04.mp3</audio>		
	</pic>
	<pic>
		<header>Construction</header>
		<text>This is an image of a very large building being constructed. What will it be????</text>
		<image>images/image05.jpg</image>
		<audio>audio/audio_05.mp3</audio>
	</pic>
	<pic>
		<header>Dome</header>
		<text>This looks like an important building. Like I should know what it is...but I don't.</text>
		<image>images/image06.jpg</image>
		<audio>audio/audio_06.mp3</audio>
	</pic>
	<pic>
		<header>Structure</header>
		<text>Possibly an image of a building being built.  Your guess is as good as mine.</text>
		<image>images/image07.jpg</image>
		<audio>audio/audio_07.mp3</audio>
	</pic>
</images>

[dawsonk]

package {
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.events.ProgressEvent;
	import flash.media.Sound;
	import flash.media.SoundChannel;
	import flash.net.URLLoader;
	import flash.net.URLRequest;
	import flash.events.MouseEvent;
	import XMLList;
	import flash.display.Loader;
	public class Images extends MovieClip {
		public var xmlLoader:URLLoader = new URLLoader();
		public var xmlData:XML = new XML();
		public var index:int=0;
		public var totalPages:int;
		public var pageNumber:int;
		public var imageLoader:Loader = new Loader();
		public var snd:Sound = new Sound();
		public var channel:SoundChannel = new SoundChannel();
		public function Images() {
			setupEvents();
		}
		public function setupEvents():void {
			xmlLoader.addEventListener(Event.COMPLETE, loadXML);
			nextButton.addEventListener(MouseEvent.CLICK, nextPage);
			backButton.addEventListener(MouseEvent.CLICK, backPage);
			xmlLoader.load(new URLRequest("images.xml"));
		}
		public function loadXML(e:Event):void {
			xmlData=new XML(e.target.data);
			totalPages = (xmlData.pic as XMLList).length();
			trace(totalPages);
			gotoPage(index);
		}
		public function gotoPage(pageIndex:int):void {
			textBox.text = (xmlData.pic.text.text()[pageIndex]);
			headerTxt.text = (xmlData.pic.header.text()[pageIndex]);
			imageLoader.load(new URLRequest(xmlData.pic.image[pageIndex]));
			imageArea.addChild(imageLoader);
			trace(xmlData.pic.audio[pageIndex]);
			channel.stop();
			snd = new Sound();
			snd.load(new URLRequest(xmlData.pic.audio[pageIndex]));
			channel=snd.play();
		}
		public function nextPage(e:MouseEvent):void {
			index++;
			index=index%totalPages;
			gotoPage(index);
		}
		public function backPage(e:MouseEvent):void {
			index--;
			index = (index + totalPages) % totalPages;
			gotoPage(index);
		}
	}
}

[ballaby]

Thank you so much. I knew I was close but couldn't find the problem.

[rachman]

Thank you so much. I knew I was close but couldn't find the problem.

can you share your fla?