Can anyone please help me or is there anything I miss out? the visualstate is not triggered
xmlns:swi="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:esi="clr-namespace:Expression.Samples.Interactivity;assembly=Expression.Samples.Interactivity"
xmlns:mei="clr-namespace:Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions"
<my:DataGridTemplateColumn IsReadOnly="True">
<my:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="vsgUrgency">
<VisualState x:Name="UrgencySerious">
<Storyboard>
<ColorAnimation Storyboard.TargetName="orbUrgency"
Storyboard.TargetProperty="Fill" To="Red"/>
</Storyboard>
</VisualState>
<VisualState x:Name="UrgencyNormal">
<Storyboard>
<ColorAnimation Storyboard.TargetName="orbUrgency"
Storyboard.TargetProperty="Fill" To="Green"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<swi:Interaction.Triggers>
<esi:DataTrigger Binding="{Binding Urgency}" Value="Serious">
<mei:GoToStateAction StateName="UrgencySerious"/>
</esi:DataTrigger>
<esi:DataTrigger Binding="{Binding Urgency}" Value="Normal">
<mei:GoToStateAction StateName="UrgencyNormal"/>
</esi:DataTrigger>
</swi:Interaction.Triggers>
<TextBlock Text="{Binding Urgency}"/>
<Path x:Name="orbUrgency" Width="14.6566" Height="14.5449" Stretch="Fill" StrokeThickness="1"
StrokeLineJoin="Round" Fill="#FFE50A0A"
Data="F1 M 9.3269,3.61737C 13.3742,3.61737 16.6552,6.87332 16.6552,10.8898C 16.6552,14.9063 13.3742,18.1623 9.3269,18.1623C 5.2796,18.1623 1.99862,14.9063 1.99862,10.8898C 1.99862,6.87332 5.27956,3.61737 9.3269,3.61737 Z ">
</Path>
</StackPanel>
</DataTemplate>
</my:DataGridTemplateColumn.CellTemplate>
</my:DataGridTemplateColumn>
