How to set the MouseOverBackgroundColor for SfRadialMenuItem?

<Page
x:Class="WinRT_KB_Application.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:WinRT_KB_Application"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:navigation="using:Syncfusion.UI.Xaml.Controls.Navigation"
mc:Ignorable="d">
<Grid x:Name="Grid1" Background="White">
<navigation:SfRadialMenu RimBackground="Purple">
<navigation:SfRadialMenuItem Header="Menu1" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Red"/>
<navigation:SfRadialMenuItem Header="Menu2" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Blue"/>
<navigation:SfRadialMenuItem Header="Menu3" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Green"/>
<navigation:SfRadialMenuItem Header="Menu4" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Green"/>
<navigation:SfRadialMenuItem Header="Menu6" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Green"/>
<navigation:SfRadialMenuItem Header="Menu7" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Green"/>
<navigation:SfRadialMenuItem Header="Menu8" ShowMouseOverStyle="True" MenuMouseOverBackgroundColor="Green"/>
</navigation:SfRadialMenu>
</Grid>
</Page>

using Syncfusion.UI.Xaml.Controls;
using Windows.UI;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace WinRT_KB_Application
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
 
SfRadialMenu _RadialMenu = new SfRadialMenu();
_RadialMenu.RimBackground = new SolidColorBrush() { Color = Colors.Purple };
SfRadialMenuItem Item1 = new SfRadialMenuItem();
Item1.Header = "Menu1";
Item1.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Brown };
Item1.ShowMouseOverStyle = true;
SfRadialMenuItem Item2 = new SfRadialMenuItem();
Item2.Header = "Menu2";
Item2.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Red };
Item2.ShowMouseOverStyle = true;
SfRadialMenuItem Item3 = new SfRadialMenuItem();
Item3.Header = "Menu3";
Item3.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Blue };
Item3.ShowMouseOverStyle = true;
SfRadialMenuItem Item4 = new SfRadialMenuItem();
Item4.Header = "Menu4";
Item4.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Pink };
Item4.ShowMouseOverStyle = true;
SfRadialMenuItem Item5 = new SfRadialMenuItem();
Item5.Header = "Menu5";
Item5.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Orange };
Item5.ShowMouseOverStyle = true;
SfRadialMenuItem Item6 = new SfRadialMenuItem();
Item6.Header = "Menu6";
Item6.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.DarkBlue };
Item6.ShowMouseOverStyle = true;
SfRadialMenuItem Item7 = new SfRadialMenuItem();
Item7.Header = "Menu7";
Item7.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Violet };
Item7.ShowMouseOverStyle = true;
SfRadialMenuItem Item8 = new SfRadialMenuItem();
Item8.Header = "Menu8";
Item8.MenuMouseOverBackgroundColor = new SolidColorBrush() { Color = Colors.Green };
Item8.ShowMouseOverStyle = true;
_RadialMenu.Items.Add(Item1);
_RadialMenu.Items.Add(Item2);
_RadialMenu.Items.Add(Item3);
_RadialMenu.Items.Add(Item4);
_RadialMenu.Items.Add(Item5);
_RadialMenu.Items.Add(Item6);
_RadialMenu.Items.Add(Item7);
_RadialMenu.Items.Add(Item8);
Grid1.Children.Add(_RadialMenu);
 
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.  The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
}
}
}