Animation from within DataTemplate - silverlight

Question

Below is the data template I'm using for a listbox's ItemTemplate. It shows some simple data, and a button, which ideally should animate a Popup, also contained within the DataTemplate. Unfortunately the whole thing blow up at runtime. The error says line 52 is wrong, which is:
<EventTrigger RoutedEvent="Button.Click">
Here's the whole DataTemplate. I've used this popup before, with the same exact content templates and even the same animation elsewhere. It's only blowing up when I try to put it into a DataTemplate. I assume the animation is having difficulty finding the right animation target - I'm hoping someone here would know more.
<DataTemplate x:Key="ItemTemplate2">
<Border Width="100" Height="100" BorderThickness="4" BorderBrush="Red">
<StackPanel>
<TextBlock Text="{Binding Name}"/>
<TextBlock Text="{Binding Price}"/>
<Popup x:Name="popupContent" IsOpen="True" Margin="10,0,0,0" Grid.Row="0" >
<Popup.Child>
<Thumb x:Name="thumbContent" DragDelta="Thumb_DragDelta" Width="0" Height="0">
<Thumb.Template>
<ControlTemplate>
<local:thumbTemplate Margin="0" x:Name="df" />
</ControlTemplate>
</Thumb.Template>
</Thumb>
</Popup.Child>
</Popup>
<Button Content="Show">
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<BeginStoryboard.Storyboard>
<Storyboard x:Name="sbShowPopup">
<DoubleAnimation Duration="0:0:1" To="200" Storyboard.TargetProperty="(FrameworkElement.Width)" Storyboard.TargetName="popupContent" d:IsOptimized="True"/>
<DoubleAnimation Duration="0:0:1" To="80" Storyboard.TargetProperty="(FrameworkElement.Height)" Storyboard.TargetName="popupContent" d:IsOptimized="True"/>
</Storyboard>
</BeginStoryboard.Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
</StackPanel>
</Border>
</DataTemplate>

Answer 1

You may have used this before but not in Silverlight. The only supported value for RoutedEvent in Silverlight is "FrameworkElement.LoadedEvent".
You will need the BlendSDK to do this sort of thing in Silverlight.