ScrollViewer in flipview

MAIN.CS

    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();

            this.Loaded += MainPage_Loaded;
        }

        private void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            this.scrollViewer.AddHandler(UIElement.ManipulationStartedEvent, new ManipulationStartedEventHandler(scroller_Manipulated), true);
            this.scrollViewer.ManipulationMode = ManipulationModes.All;
        }

        private void scroller_Manipulated(object sender, ManipulationStartedRoutedEventArgs e)
        {
            
        }
    }

MAIN.XAML

         <FlipView x:Name="flipViewX" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="266">
            <FlipViewItem x:Name="Item1">
                <ScrollViewer x:Name="scrollViewer">
                    <StackPanel x:Name="stack">
                        <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>
                    <TextBlock Text="THIS IS TEXT"></TextBlock>

                    </StackPanel>
                </ScrollViewer>
            </FlipViewItem>
            <FlipViewItem x:Name="Item2" >
                <TextBlock Text="THIS IS TEXT"></TextBlock>
            </FlipViewItem>
        </FlipView>