ScrollViewer navigation error

[Bruno]

When I removed the ScrollViewer worked fine but when I put the navigation worked fine at first but then stoped.
What's wrong?

<navigation:Page 

           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"

           xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"

           xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="QuadrinhosSilverlight.View.Paginas"

           mc:Ignorable="d"           

           Title="Paginas Page" Loaded="Page_Loaded" >

    <navigation:Page.Resources>

        <DataTemplate x:Name="LeftPageTemplate">

            <StackPanel Margin="5" Background="White" MinWidth="380">

                <Image Source="{Binding Imagem}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Stretch="Uniform" MinWidth="370"/>

            </StackPanel>

        </DataTemplate>

        <DataTemplate x:Name="RightPageTemplate">

            <StackPanel Margin="5"  Background="White" MinWidth="380">

                <Image Source="{Binding Imagem}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Stretch="Uniform" MinWidth="370"/>

            </StackPanel>

        </DataTemplate>

    </navigation:Page.Resources>

    <ScrollViewer VerticalScrollBarVisibility="Visible">

        <Grid x:Name="LayoutRoot" Margin="0">

            <telerik:RadBook x:Name="Gibi" LeftPageTemplate="{StaticResource LeftPageTemplate}" RightPageTemplate="{StaticResource RightPageTemplate}" Margin="5,5,0,0" RightPageIndex="2" IsKeyboardNavigationEnabled="True" FoldSize="100,100" HorizontalAlignment="Left" VerticalAlignment="Top" />

        </Grid>

    </ScrollViewer>

</navigation:Page>

//Binding

        ObservableCollection<ImageItem> _listaDeImagens = new ObservableCollection<ImageItem>();

foreach (var item in _listaDePaginas)

        {

          _listaDeImagens.Add(new ImageItem()

          {

              Imagem = "/img/historia/" + item.Historia.Id.ToString() + "/" + item.NomeDoArquivo

          });

        }

        Gibi.ItemsSource = _listaDeImagens;
//---

public class ImageItem

    {

        public int Id { get; set; }

        public string Imagem { get; set; }

        public string Titulo { get; set; }

    }

[Kiril Stanoev]

Hi Bruno,

Thank you for your feedback. We are aware of this issue as it is already logged in our public issue tracking system. Currently we are not aware of what is causing the problem, so keep track of the PITS item for further information.

Kind regards,
Kiril Stanoev
the Telerik team