HorizontalTimelineGroupTemplate is disabled...

[Luigi]

Hi
we need to add a couple of buttons to the HorizontalTimelineGroupTemplate
but the buttons remain disabled.
we tried to change it through the

OrientedTimeRulerItemStyleSelector.HorizontalGroupItemStyle

but it doesn`t seem to work.
Thanks

<scheduleView:TimeRulerItemTemplateSelector x:Key="timeRulerItemTemplateSelector" >
            <scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineGroupTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal" IsEnabled="True" Focusable="True">
                        <TextBlock Text="{Binding FormattedValue}" Background="Red"/>
                        <Button Content="+" IsEnabled="True"/>
                        <Button Content="-"/>
                        <TextBox Width="20" Text="123"/>
                    </StackPanel>
                </DataTemplate>
            </scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineGroupTemplate>