TypeError: Error #1034: 强制转换类型失败:无法将 flash.events::MouseEvent@73b7cc1 转换为 mx.events.ItemClickEvent。

TypeError: Error #1034: 强制转换类型失败:无法将 flash.events::MouseEvent@73b7cc1 转换为 mx.events.ItemClickEvent。

/**
			 * 查询按钮点击函数
			 */
			protected function search_clickHandler(event:MouseEvent):void
			{
				search.addEventListener(MouseEvent.CLICK,radiogroup_itemClickHandler);
			}

			/**
			 * 单选按钮点击函数
			 */
			protected function radiogroup_itemClickHandler(event:ItemClickEvent):void
			{
				if(event.currentTarget.selectedValue=="苹果")
				{
					apple.visible = true;
					banana.visible = false;
					appleRate.visible = true;
				}
				else if(event.currentTarget.selectedValue=="香蕉")
				{
					apple.visible = false;
					banana.visible = true;
					appleRate.visible = false;
				}
			}