TouchMove is not detected

programming flash
1

Hi, I’m trying to trace a message and testing some TouchEvent in Device Central with device Flash 10.1 Multitouch. I got TOUCH_BEGIN to work but I can’t get TOUCH_MOVE trace message to appear even though I’ve pressed Alt and move the mouse at the same time on the display sprite. So what am I doing wrong?


package  
{
	import flash.display.MovieClip;
	import flash.events.TouchEvent;
	import flash.ui.Multitouch;
	import flash.ui.MultitouchInputMode;
	import flash.display.Sprite;
	import flash.display.Shape;
	
	public class ExpTouch extends MovieClip
	{
		public function ExpTouch()
		{
			var display:Sprite = new Sprite();
			var back:Shape = new Shape();
			back.graphics.beginFill(0x000000, 1);
			back.graphics.lineStyle(2, 0xFFFFFF, 1);
			back.graphics.drawRect(0,0,stage.stageWidth - 20,stage.stageHeight - 100);
			back.graphics.endFill();
			display.addChild(back);
			display.x = 10;
			display.y = 10;
			addChild(display);
			
			if(Multitouch.supportsTouchEvents)
			{
				Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
				display.addEventListener(TouchEvent.TOUCH_BEGIN, touchBegin);
				display.addEventListener(TouchEvent.TOUCH_END, touchEnd);
				display.addEventListener(TouchEvent.TOUCH_MOVE, touchMove);
				display.addEventListener(TouchEvent.TOUCH_OVER, touchOver);
				display.addEventListener(TouchEvent.TOUCH_TAP, touchTap);
			}
		}
		
		private function touchBegin(e:TouchEvent):void
		{
			trace("touch begins");
		}
		
		private function touchEnd(e:TouchEvent):void
		{
			trace("touch ends");
		}
		
		private function touchMove(e:TouchEvent):void
		{
			trace("touch move");
		}
		
		private function touchOver(e:TouchEvent):void
		{
			trace("touch over");
		}
		
		private function touchTap(e:TouchEvent):void
		{
			trace("touch tap");
		}
	}
}

I also tried to run this SWF on the Blackberry Playbook test device and Device Central pops up a message saying Touch Point is not supported. How can this be possible if Blackberry Playbook has a touch screen?

Thanks for the help.