Image of style isn't displayed in visual studio designer - silverlight

Question

in my silverlight for windows phone app, i've created this xaml in the mainpage of a basic project :
<phone:PhoneApplicationPage.Resources>
<Style x:Key="TestStyle" TargetType="CheckBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CheckBox">
<Grid x:Name="grid" Width="{TemplateBinding Width}" Height="{TemplateBinding Height}">
<vsm:VisualStateManager.VisualStateGroups>
<vsm:VisualStateGroup x:Name="CheckStates">
<vsm:VisualState x:Name="Checked">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="image" Storyboard.TargetProperty="Source">
<DiscreteObjectKeyFrame KeyTime="0" Value="ApplicationIcon.png"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="Unchecked"/>
<vsm:VisualState x:Name="Indeterminate">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="image" Storyboard.TargetProperty="Source">
<DiscreteObjectKeyFrame KeyTime="0" Value="ApplicationIcon.png"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
</vsm:VisualStateManager.VisualStateGroups>
<Image x:Name="image" Source="ApplicationIcon.png" Margin="0 0 0 10" Stretch="Fill" VerticalAlignment="Center" Width="32" Height="32"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</phone:PhoneApplicationPage.Resources>
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock x:Name="ApplicationTitle" Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="PageTitle" Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<CheckBox Style="{StaticResource TestStyle}" />
</Grid>
</Grid>
When running the application, the image is correctly displayed in the application, but not in the designer.
This is annoying because I can't style my application.
Any way to fix that ? workaround ?
Thanks in advance for any help

Answer 1

Should be a bug, in blend it's ok