ListBox filled by DataTemplate doesn't scroll WPF
===

I fill listbox via this code:

    <ListBox Height="188" HorizontalAlignment="Left" Margin="277,0,0,0" Name="listBoxAtributeValue" VerticalAlignment="Top" Width="191" MaxHeight="188" MaxWidth="191">
            <ItemsControl ItemsSource="{Binding Path=.}">
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal">
                            <StackPanel.Background>
                                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                    <GradientStop Color="Black" Offset="0" />
                                    <GradientStop Color="#FFFFA029" Offset="1" />
                                </LinearGradientBrush>
                            </StackPanel.Background>
                                <Label Content="{Binding lblText}" />
                                <TextBox Text="{Binding txtBoxContent}" />
                        </StackPanel>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </ListBox>

but I can't scroll it.
Here is an image of listBox: [Here][1]


  [1]: http://i48.tinypic.com/fuyja1.jpg
How can I fix that? Thak you.