*　视觉状态控制：为什么小弟我的控件无法显示

***求助***　视觉状态控制：为什么我的控件无法显示
我是新手，高手帮忙啊，下面是我的代码，不知道我的ｃｈｅｃｋｂｏｘ　为什么显示不出来啊。

App.xaml 视觉控制　checkbox
<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
  x:Class="SilverlightApplicationTest01.App"
  xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows"
  >
  <Application.Resources>
  <ControlTemplate x:Key="myCheckBoxControlTemplate" TargetType="CheckBox">
  <Grid>
  <vsm:VisualStateManager.VisualStateGroups>
  <!-- CommonStates Group -->
  <vsm:VisualStateGroup x:Name="CommonStates">

  <!-- CommonState StateGroup -->
  <vsm:VisualState x:Name="Normal">
  </vsm:VisualState>
  <!-- MouseOver State -->
  <vsm:VisualState x:Name="MouseOver">
  <Storyboard>
  <DoubleAnimation 
  Storyboard.TargetName="Glow" 
  Storyboard.TargetProperty="Opacity" 
  Duration="0" To="1" />
  </Storyboard>
  </vsm:VisualState>
  <!-- Pressed State -->
  <vsm:VisualState x:Name="Pressed">
  <Storyboard>
  <DoubleAnimation Storyboard.TargetName="HighlightBorder" 
  Storyboard.TargetProperty="Opacity" 
  Duration="0" To=".6" />
  <ColorAnimation Storyboard.TargetName="InnerBorder"
  Storyboard.TargetProperty="(Border.BorderBrush).(GradientBrush.GradientStops)[0].(GradientStop.Color)"
  Duration="0" To="#FF000000" />
  <ColorAnimation Storyboard.TargetName="InnerBorder" 
  Storyboard.TargetProperty="(Border.BorderBrush).(GradientBrush.GradientStops)[1].(GradientStop.Color)"
  Duration="0" To="#FF000000" />
  </Storyboard>
  </vsm:VisualState>
  <!-- Disabled State -->
  <vsm:VisualState x:Name="Disabled">
  <Storyboard>
  <DoubleAnimation 
  Storyboard.TargetName="Root"
  Storyboard.TargetProperty="Opacity"
  Duration="0" To=".5" />
  </Storyboard>
  </vsm:VisualState>
   
  <!-- CommonStates Transitions -->
  <vsm:VisualStateGroup.Transitions>