让Silverlight 2.0动画动起来Making Silverlight 2.0 animation Start(不能运动原因)

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace feiruwenzi
{
public partial class Page : UserControl
{
public Page()
{
// Required to initialize variables
InitializeComponent();
this.Loaded += new RoutedEventHandler(Page_Loaded);
//委托挂钩注册,这样才有效,建议用VS或者VWD时候,用TAB键操作
}
void Page_Loaded(object sender, RoutedEventArgs e)
{
ballmove.Begin();//动起来
}
}
}