Почему EventTrigger не вызывает раскадровку?

Question

У меня есть MainWindow.xaml с одной сеткой

    <Grid.Effect>
        <BlurEffect x:Name="blurEffect" Radius="{StaticResource StartBluringValue}"/>
    </Grid.Effect>

    <Grid.Triggers>
        <EventTrigger RoutedEvent="local:MainWindow.Blured">
            <BeginStoryboard Storyboard="{StaticResource MainWindow_Bluring}"/>
        </EventTrigger>
        <EventTrigger RoutedEvent="local:MainWindow.UnBlured">
            <BeginStoryboard Storyboard="{StaticResource MainWindow_UnBluring}"/>
        </EventTrigger>
    </Grid.Triggers>

И у меня есть MainWindow.xaml.cs с некоторыми RoutedEvents, подобными этому

    public static readonly RoutedEvent BluredEvent =
        EventManager.RegisterRoutedEvent("Blured", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(MainWindow));

    public event RoutedEventHandler Blured
    {
        add { AddHandler(BluredEvent, value); }
        remove { RemoveHandler(BluredEvent, value); }
    }

    private void OnBlured()
    {
        RaiseEvent(new RoutedEventArgs(BluredEvent));
    }

Но раскадровка не запускается.Например, StoryBoard:

                <Storyboard x:Key="MainWindow_Bluring">
                    <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(BlurEffect.Radius)" Storyboard.TargetName="blurEffect">
                        <DiscreteDoubleKeyFrame KeyTime="{StaticResource AnimationStartTime}" Value="{StaticResource StartBluringValue}"/>
                        <DiscreteDoubleKeyFrame KeyTime="{StaticResource AnimationEndTime}" Value="{StaticResource StopBluringValue}"/>
                    </DoubleAnimationUsingKeyFrames>
                </Storyboard>