 		protected function configureChildren():void {
 			contentMask = getChildById(CONTENT_MASK);
 			contentContainer = getChildById(CONTENT_CONTAINER);
-			trace(">> CONFIGUR CHILDREN");
-			contentContainer.mask = contentMask;
 			
 			leftButton.addEventListener(MouseEvent.CLICK, leftButtonClickHandler);
 			rightButton.addEventListener(MouseEvent.CLICK, rightButtonClickHandler);

			var xml:XML = <HBox width="100%" height="100%" horizontalGutter={horizontalGutter} padding={padding} xmlns="laml.display">
							<Button id={LEFT_BUTTON} width="30" height="100" backgroundColor="#ff0000" />
							<Component width="100%" height="100%">
								<Row id={CONTENT_CONTAINER} excludeFromLayout="true" backgroundColor="#ff0000" horizontalGutter={horizontalGutter} padding={padding} />
								<Component id={CONTENT_MASK} backgroundColor="#0000ff" width="100%" height="100%" />
							</Component>
							<Button id={RIGHT_BUTTON} width="30" height="100" backgroundColor="#ff0000" />

			contentContainer.invalidateDisplayList();
			contentContainer.render();

			if(!contentContainer.mask) {
				contentContainer.mask = contentMask;
				contentContainer.view.cacheAsBitmap = true;
			}
		}
		
		private function getItemSize(w:Number):Number {
