PivotItem Header and ListPicker inside
===

I face issue with ListPicker inside PivotItem Header. How to resolve it?
My code:

    <controls:PivotItem Name="PivotItemTop">
    <controls:PivotItem.Header>    
        <StackPanel Background="#6DA3BD" 
                    Margin="-24,-20,-1,0"
                    Width="420"
                    Name="StackPanelTop">  
            <TextBlock Text="TEST"
                        FontSize="48"
                        Foreground="White"
                        Padding="23,0"/>
            <toolkit:ListPicker Margin="24,0,24,10" 
                                Template="{StaticResource ListPickerTemplate}"
                                Name="ListPickerTop"
                                SelectionChanged="ListPickerTop_SelectionChanged">
            </toolkit:ListPicker>
        </StackPanel>
    </controls:PivotItem.Header>
              
    <ListBox Name="ListBoxTop"
                    ItemsSource="{Binding TopItems}"
                    ItemTemplate="{StaticResource ItemListBox}"/>
    
    </controls:PivotItem>



and to fill:

    ListPickerTop.ItemsSource = new List<string> { "1", "2", "3", "4", "5" };


Please see result on picture:

[enter link description here][1]

[enter link description here][2]


  [1]: http://www35.zippyshare.com/v/52464056/file.html
  [2]: http://www35.zippyshare.com/i/52464056/9126813/qqqq.png