MVVM ListBox Trouble

<phone:PhoneApplicationPage x:Class="MvvmLight5.MainPage"
                            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                            xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
                            xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
                            xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                            xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                            xmlns:ignore="http://www.ignore.com"
                            mc:Ignorable="d ignore"
                            FontFamily="{StaticResource PhoneFontFamilyNormal}"
                            FontSize="{StaticResource PhoneFontSizeNormal}"
                            Foreground="{StaticResource PhoneForegroundBrush}"
                            SupportedOrientations="Portrait"
                            Orientation="Portrait"
                            shell:SystemTray.IsVisible="True"
                            DataContext="{Binding Main, Source={StaticResource Locator}}">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot"
          Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel"
                    Grid.Row="0"
                    Margin="12,17,0,28">
            <TextBlock Text="MY APPLICATION"
                       Style="{StaticResource PhoneTextNormalStyle}"
                       Margin="12,0" />
            <TextBlock Text="page name"
                       Margin="9,-7,0,0"
                       Style="{StaticResource PhoneTextTitle1Style}" />
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel"
              Grid.Row="1"
              Margin="12,0,12,0">
            <TextBlock Text="{Binding theText}">

            </TextBlock>

            <ListBox x:Name="myListBox" HorizontalAlignment="Left" Height="100" ItemsSource="{Binding theList}"
                 VerticalAlignment="Top" Width="200">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <ItemsControl ItemsSource="{Binding theList}">
                            <ItemsControl.ItemTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Horizontal" Width="auto">
                                        <TextBlock Text="{Binding Path=Key}" />
                                        <TextBlock Text="{Binding Path=Value}" />
                                    </StackPanel>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
            <ListBox x:Name="myListBox2" HorizontalAlignment="Left" Height="100"
                 VerticalAlignment="Bottom" Width="200">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <ItemsControl ItemsSource="{Binding}">
                            <ItemsControl.ItemTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Horizontal" Width="auto">
                                        <TextBlock Text="{Binding Path=Key}" />
                                        <TextBlock Text="{Binding Path=Value}" />
                                    </StackPanel>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>


            <TextBlock Text="{Binding WelcomeTitle}"
                       Style="{StaticResource PhoneTextNormalStyle}"
                       HorizontalAlignment="Center"
                       VerticalAlignment="Center"
                       TextAlignment="Center"
                       TextWrapping="Wrap"
                       FontSize="40" />

        </Grid>
    </Grid>

</phone:PhoneApplicationPage>