public MainPage()
        {
            InitializeComponent();
            mySlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(MySliderValueChanged);
        }

         void MySliderValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
         {
             MyEllipse.Width = mySlider.Value;
             MyEllipse.Height = mySlider.Value;
        }

这段代码总是运行不出来效果  用火狐浏览器提示

Unhandled Error in Silverlight Application [Parser_SetValue_Exception]
参数: System.Windows.Controls.Primitives.RangeBase.Minimum
调试资源字符串不可用。密钥和参数通常提供足够的信息用以诊断该问题。请访问 http://go.microsoft.com/fwlink/?linkid=106663&Version=4.1.10329.0&File=System.Windows.dll&Key=Parser_SetValue_Exception [Line: 11 Position: 118]   位于 System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
   位于 Silverlight.MainPage.InitializeComponent()
   位于 Silverlight.MainPage..ctor()
   位于 Silverlight.App.Application_Startup(Object sender, StartupEventArgs e)
   位于 MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   位于 MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)
求高手帮我解答下