Change property on a parent event - wpf

Question

I'm trying to change a border property inside a button content when mouse is over the button itself.
This is not working for me and I'm wondering why, any help please?
<Style x:Key="ButtonGenericStyle" TargetType="{x:Type Button}">
<Setter Property="Width" Value="200"></Setter>
<Setter Property="Height" Value="35"></Setter>
<Setter Property="HorizontalContentAlignment" Value="Stretch"></Setter>
<Setter Property="VerticalContentAlignment" Value="Stretch"></Setter>
<Setter Property="Padding" Value="0"></Setter>
<Setter Property="BorderThickness" Value="0.6"></Setter>
<Setter Property="BorderBrush" Value="#333"></Setter>
<Setter Property="Cursor" Value="Hand"></Setter>
</Style>
<Style x:Key="AddButtonStyle" BasedOn="{StaticResource ButtonGenericStyle}" TargetType="{x:Type Button}">
<Setter Property="Content">
<Setter.Value>
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="Auto"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Image Width="24" Margin="5,0,0,0" Source="/Images/AddNew.png"></Image>
<TextBlock Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Text="{x:Static local:GenericGridResources.AddButtonText}"></TextBlock>
<Border x:Name="borderAdorner" Grid.Column="2" Width="5" Background="#00C176">
<Border.Style>
<Style TargetType="{x:Type Border}">
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Button}}, Path=IsMouseOver}" Value="True">
<Setter Property="Background" Value="Red"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</Border.Style>
</Border>
</Grid>
</Setter.Value>
</Setter>
</Style>
Thanks
Edit: I already set the padding to 10 and change the alignment to center to ensure that my button had not been covered.
Also, I debugged throught a converter at the DataTrigger binding and value sended was the Button. Still Border background doesn't change.
***** I change in my post the AncestorType from Image to Button. I ended copying a bad code from many tests. People answering that the ancestorTyoe should be a parent are totally rightm thanks and apologies.**

Answer 1

If you want mouse over the button to work then the ancestortype should be button:
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Button}}, Path=IsMouseOver}" Value="True">
<Setter Property="Background" Value="Red"></Setter>
</DataTrigger>
As it is, there is a sibling of your border which is an image. Findancestor will be looking up the visual tree and the border is not a child of the image.
You will also need to ensure there is something hit testable inside or as the background when the user mouse-overs the button. I mention this because it's not totally clear what your ButtonGenericStyle does.