WPF visual state transition won't animate - wpf

Question

I am trying to animate the position of an element using visual states. The problem I have is that, rather than animate, it waits the transition period (0.333 seconds) and pops to the end position. What am I doing wrong?
<UserControl x:Class="Namespace.UpdateNotificationView" x:Name="UserControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid x:Name="LayoutRoot">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="UpdatesViewState">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.333">
<VisualTransition.GeneratedEasingFunction>
<CircleEase EasingMode="EaseInOut"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="NoUpdatesState"/>
<VisualState x:Name="UpdatesAvailableState">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="Toast">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="Toast" Background="#FFFFFBE9" CornerRadius="0,0,20,0" BorderBrush="#FFFFD100" BorderThickness="0,0,2,2" RenderTransformOrigin="0.5,0.5">
<Border.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform Y="-75"/>
</TransformGroup>
</Border.RenderTransform>
<Grid Margin="15,5">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Image Source="/Namespace;component/Skins/Images/Update.png" Width="48" Height="48" Margin="0,0,15,0"/>
<TextBlock TextWrapping="Wrap" Text="Updates Available" Foreground="Black" Grid.Column="1" FontWeight="Bold" VerticalAlignment="Center" FontSize="29.333"/>
</Grid>
</Border>
</Grid>