How to bind wait cursor using mvvm in wpf?

Question

Hi all ,
I am using one Convertor class to show waiting cursor while login here is my code :

 public class BoolToCursor : IValueConverter

    {

        private static readonly BoolToCursor defaultInstance = new BoolToCursor();

        public static BoolToCursor Default { get { return defaultInstance; } }

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

        {

            return (bool)value ? Cursors.Wait : Cursors.Arrow;

        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

        {

            return (bool)value ? Cursors.Arrow : Cursors.Wait;

        }

    }



and im writing one Bool property in my MVVM which im binding in my XAML code but my waiting cursor is not coming plz help