HierarchinalDataTemplate component not to highlight when selected

Hello guys,

I've got the following resource dictionary in my wpf form

<ResourceDictionary><Style x:Key="TreeViewItemStyle" TargetType="TreeViewItem"><Setter Property="IsExpanded" Value="True" /><Setter Property="IsSelected" Value="{Binding IsInitiallySelected, Mode=OneTime}" /><Setter Property="KeyboardNavigation.AcceptsReturn" Value="True" /></Style><HierarchicalDataTemplate x:Key="CheckBoxItemTemplate" ItemsSource="{Binding Children, Mode=OneTime}"><StackPanel Margin="0,5,0,0" Orientation="Horizontal"><CheckBox Focusable="False" IsChecked="{Binding IsChecked}" VerticalAlignment="Center" Background="Transparent"/><ContentPresenter Content="{Binding Name, Mode=OneTime}" Margin="2,0"/></StackPanel></HierarchicalDataTemplate></ResourceDictionary>

And then created a tree view as follows 

<!--Configuration Permissions--><TreeView Grid.Column="0" Grid.Row="2" Height="110" HorizontalAlignment="Left" Margin="12,10,0,0" x:Name="configurationPermissions" VerticalAlignment="Top" Width="190" 
                            ItemContainerStyle="{StaticResource TreeViewItemStyle}"
                            ItemTemplate="{StaticResource CheckBoxItemTemplate}" />

For some reason, when I click on the text of the check box, it highlights the background

it seems to be highlighting a component behind the checkbox and the text of the check box. I want to disable that. 

How can I do that?

Thanks.