VisualStates and DataTriggerBehaviors - xaml

Question

I have defined a custom VisualState for an AppBarButton in a Style.
I'm trying to use GoToStateAction to change the state with a DataTriggerBehavior, but it doesn't work and I have no idea how to debug it :(
I'm guessing that it is an issue with Interaction in a style, as I also tried changing the DataTriggerBehavior to an EventTriggerBehavior and that didn't fire either.
The Style:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="using:Microsoft.Xaml.Interactivity"
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:eim="using:Microsoft.Xaml.Interactions.Media"
xmlns:vm="using:Test.ViewModel">
<Style x:Key="AppBarBtnStyle" TargetType="AppBarButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="AppBarButton">
<Border x:Name="bord" CornerRadius="12" Background="Gray" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="4">
<Grid x:Name="Root" MinWidth="{TemplateBinding MinWidth}" MaxWidth="{TemplateBinding MaxWidth}" Background="{TemplateBinding Background}">
<i:Interaction.Behaviors>
<core:DataTriggerBehavior Binding="{Binding FlashControl}" ComparisonCondition="Equal" Value="{TemplateBinding Name}" >
<core:GoToStateAction StateName="Flash"/>
</core:DataTriggerBehavior>
</i:Interaction.Behaviors>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Flash">
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="(Root.BorderBrush).(SolidColorBrush.Color)" EnableDependentAnimation="True" Duration="0:0:1" RepeatBehavior="Forever" AutoReverse="False">
<DiscreteColorKeyFrame Value="Red" KeyTime="0:0:0"/>
<DiscreteColorKeyFrame Value="Blue" KeyTime="0:0:0.75"/>
<DiscreteColorKeyFrame Value="Red" KeyTime="0:0:1"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
The Binding Property:
Private mFlashControl As String
Public Property FlashControl() As String
' The Name of the Control to Flash
Get
Return mFlashControl
End Get
Set(value As String)
SetProperty(mFlashControl, value)
End Set
End Property
The Button:
<AppBarButton x:Name="myButton" Style="{StaticResource AppBarBtnStyle}" Icon="Clock"/>
So if I set the FlashControl Property to "myButton", all the Buttons with that Style will run the DataTriggerBehavior to check if their Name Property matches that of FlashControl.
If a match is found then the VisualState of the Button will be changed and run the flash Storyboard.