LongListSelector JumpListStyle background binding not works

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C#

XAML

WinRT

Windows-Phone-8

I am using longlistselector in my win phone 8 app. I have used ItemTemplate, GroupHeaderTemplate and JumpListStyle. For GroupHeaderTemplate I am using xaml

<DataTemplate>
    <Grid Margin="0 0 0 10">
          <Grid.Background>
                  <SolidColorBrush Color="{Binding DataContext.ForegroundColor, ElementName=LayoutRoot}"/>
          </Grid.Background>
     </Grid>
   </DataTemplate>

This is working fine. But if I apply same to ItemTemplate for JumpListStyle than it does nothing. The only difference is in this case template is defining inside style.

<phone:LongListSelector.JumpListStyle>
     <Style TargetType="phone:LongListSelector">
          <Setter Property="ItemTemplate" Value="{StaticResource JumpListDataTemplate}"/>
      </Style>
  </phone:LongListSelector.JumpListStyle>

Any suggestion, what is wrong with the above code?