***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>
<vsm:VisualTransition GeneratedDuration="0:0:.5" />
<vsm:VisualTransition GeneratedDuration="0:0:.8" To="MouseOver" />
<vsm:VisualTransition GeneratedDuration="0:0:.2" From="Pressed"/>
<vsm:VisualTransition GeneratedDuration="0" From="MouseOver" To="Pressed"/>
</vsm:VisualStateGroup.Transitions>
</vsm:VisualStateGroup>
<!-- CheckStates Group -->
<vsm:VisualStateGroup x:Name="CheckStates">
<!-- Unchecked State -->
<vsm:VisualState x:Name="Unchecked" />
<!-- Checked State -->
<vsm:VisualState x:Name="Checked">
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="Checkmark"
Storyboard.TargetProperty="Opacity"
Duration="0" To="1"/>
</Storyboard>
</vsm:VisualState>
<!-- Indeterminate State -->
<vsm:VisualState x:Name="Indeterminate">
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="IndeterminateRect"
Storyboard.TargetProperty="Opacity"
Duration="0" To="1"/>
</Storyboard>
</vsm:VisualState>
<!-- CheckStates Transitions -->
<vsm:VisualStateGroup.Transitions>
<vsm:VisualTransition GeneratedDuration="0:0:.2" />
</vsm:VisualStateGroup.Transitions>
</vsm:VisualStateGroup>
</vsm:VisualStateManager.VisualStateGroups>
<StackPanel x:Name="Root">
<Border x:Name="OuterBorder" Width="50" Height="50">
<Border x:Name="InnerBorder">
<Grid>
<Border x:Name="HighlightBorder"></Border>
<Rectangle x:Name="Glow" Opacity="0"></Rectangle>
<Path x:Name="Checkmark" Opacity="0"></Path>
<Rectangle x:Name="IndeterminateRect" Opacity="0"></Rectangle>
</Grid>
</Border>
</Border>
<ContentPresenter />
</StackPanel>
</Grid>
</ControlTemplate>
</Application.Resources>
</Application>
Page.xmal
<UserControl x:Class="SilverlightApplicationTest01.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="300">
<Canvas Background="White">
<CheckBox x:Name="myCheckBox" Canvas.Left="40" Canvas.Top="50" Template="{StaticResource myCheckBoxControlTemplate}" />
</Canvas>
</UserControl>
错误在哪呢， 十分不明白，silverlight上来就给我个下马威，脑子不够用了，高手帮忙啊。
[解决办法]
<CheckBox x:Name="myCheckBox" Canvas.Left="40" Canvas.Top="50" Template="{StaticResource myCheckBoxControlTemplate}" />