Hi all, I want to change the direction of my marquee on changeDirection button click. My code for changing direction is :

    private void changeDirection_click(object sender, RoutedEventArgs e)
    {
        if (_marqueeType == MarqueeType.RightToLeft)
        {
            _marqueeType = MarqueeType.LeftToRight;
            StartMarqueeing(_marqueeType);
        }
        else if (_marqueeType == MarqueeType.LeftToRight)
        {
            _marqueeType = MarqueeType.RightToLeft;
            StartMarqueeing(_marqueeType);
        }
    }

And code for start marquee is :

public void StartMarqueeing(MarqueeType marqueeType)
    {

        double height = canMain.ActualHeight - marqueeList.ActualHeight;
        marqueeList.Margin = new Thickness(0, 0, 0, 0);            
        doubleAnimation.From = -marqueeList.ActualWidth;
        doubleAnimation.To = canMain.ActualWidth;
        doubleAnimation.RepeatBehavior = RepeatBehavior.Forever;
        doubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(_marqueeTimeInSeconds));

        if (marqueeType == MarqueeType.RightToLeft)
        {
            Storyboard.SetTargetProperty(doubleAnimation, new PropertyPath("(Canvas.Right)"));
            _storyBoard.Children.Add(doubleAnimation);
            _storyBoard.Begin(marqueeList, true); 
        }
        else if (marqueeType == MarqueeType.LeftToRight)
        {
            Storyboard.SetTargetProperty(doubleAnimation, new PropertyPath("(Canvas.Left)"));
            _storyBoard.Children.Add(doubleAnimation);
            _storyBoard.Begin(marqueeList, true); 
        }
    }

Now here I am able to change the direction from Right to Left only first time. But when I am change it from Left to Right it’s not changing the marquee position Left to Right.

Please help me on this...........its urgent!!!!!!!!!!!