Stop WPF animation, storyboard begin in xaml but stopping it in codebehind?

I created an animation storyboard in xaml file. That story board begins on Button.Click. But to stop the animation I am trying to stop storyboard on my custom event in code behind. The code is not throwing any exception but When my event got fired the animation still goes continue.

I think the issue is with the Stop method. Stop required the same object that begins the animation to stop it. But here the storyboard is begin in WPF xaml and I am stopping it in code behind.

Any Solution, how to get Xaml object in code behind or Any alternative solution for this??

XAML CODE:

<Canvas.Triggers>
            <EventTrigger RoutedEvent="Button.Click" SourceName="ScanButton">
                <EventTrigger.Actions>
                    <BeginStoryboard >
                        <Storyboard  Name="MovingServer" Storyboard.TargetName="ImageMove" RepeatBehavior="Forever" >
                            <DoubleAnimation Storyboard.TargetProperty="(Canvas.Left)" Duration="0:0:2" From="30" To="300" BeginTime="0:0:0" />
                            <DoubleAnimation Storyboard.TargetProperty="(Canvas.Left)" Duration="0:0:5" From="300" To="300" BeginTime="0:0:5" />
                            <DoubleAnimation Storyboard.TargetProperty="(Canvas.Left)" Duration="0:0:2" From="300" To="600" BeginTime="0:0:7" />
                            <DoubleAnimation Storyboard.TargetProperty="Opacity" Duration="0:0:2" From="1" To="0" BeginTime="0:0:7" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger.Actions>
            </EventTrigger>

Code Behind:

    private void EventPublisher_OnScanningFinish(object sender, EventArgs args)
    {
        Dispatcher.Invoke(DispatcherPriority.Normal, (Action)delegate() { this.StopScanningAnimation(); });
    }

    private void StopScanningAnimation()
    {

        ServerView.StoryBoardServerScrolling.Stop(this); //---------- Not Working

        //this.ServerView.Server1Static.Visibility = System.Windows.Visibility.Hidden;
        //this.ServerView.Server2Static.Visibility = System.Windows.Visibility.Hidden;
        //this.ServerView.Server3Scrolling.Visibility = System.Windows.Visibility.Hidden;
        //this.ServerView.SearchingGlass.Visibility = System.Windows.Visibility.Hidden;
    }