Style not applying

Question

Good Morning all,

For some reason this style is not working for my ContextMenu item, please could you tell me why?

Thanks for any help

    <Style x:Key="MyStyle" TargetType="MenuItem">

        <Style.Triggers>

            <Trigger Property="IsEnabled" Value="False">

                <Setter Property="TextBlock.TextDecorations" Value="Strikethrough"/>

            </Trigger>

        </Style.Triggers>

    </Style>

    <ContextMenu x:Key="SysTrayMenu">

        <MenuItem Header="Show Window" Command="{Binding ShowWindowCommand}" />

        <MenuItem Header="Hide Window" Command="{Binding HideWindowCommand}" Style="{StaticResource MyStyle}"/>

        <MenuItem Header="Exit" Command="{Binding ExitApplicationCommand}" />

    </ContextMenu>