用于图像效果的控件模板中的WPF绑定错误

我需要一些帮助来解决我从自定义按钮上的样式获得的绑定错误 . 这是xaml：

<Style TargetType="{x:Type Controls:DropDownButton}" BasedOn="{StaticResource ButtonBaseStyle}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Controls:DropDownButton}">
                        <Border
                            x:Name="border"
                            Padding="{TemplateBinding Padding}"
                            HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
                            VerticalAlignment="{TemplateBinding VerticalAlignment}">
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*"/>
                                    <ColumnDefinition Width="Auto"/>
                                </Grid.ColumnDefinitions>

                                <Grid Grid.Column="0" >
                                    <Border Padding="5">
                                        <Grid>
                                            <Grid.RowDefinitions>
                                                <RowDefinition Height="*"/>
                                                <RowDefinition Height="*"/>
                                            </Grid.RowDefinitions>

                                            <Grid Grid.Row="0">
                                                <Image 
                                                    Style="{StaticResource DefaultImageStyle}" 
                                                    Source="{Binding SmallImage, Converter={StaticResource LocalizingConverter}}">
                                                    <Image.Effect>
                                                        <ShaderEffects:GrayscaleEffect 
                                                            DesaturationFactor="1" 
                                                            IsEnabled="{Binding IsEnabled, RelativeSource={RelativeSource TemplatedParent}}"/>
                                                    </Image.Effect>
                                                </Image>
                                            </Grid>
                                            <Grid Grid.Row="1">
                                                <TextBlock 
                                                    Style="{StaticResource DefaultTextHeaderStyle}" 
                                                    Text="{Binding Name, Converter={StaticResource LocalizingConverter}}"/>
                                            </Grid>
                                        </Grid>
                                    </Border>
                                </Grid>
                                <Grid 
                                    Grid.Column="1"
                                    VerticalAlignment="Stretch">
                                    <Polygon                                                                    
                                        x:Name="arrow"
                                        Points="0,0 8,0 4,5"                                                                                                                                              
                                        Fill="{TemplateBinding Foreground}"
                                        VerticalAlignment="Center"
                                        HorizontalAlignment="Center"/>
                                </Grid>
                            </Grid>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

哪个应用程序启动时会给我以下绑定错误：

System.Windows.Data错误：2：找不到目标元素的管理FrameworkElement或FrameworkContentElement . BindingExpression：路径=的IsEnabled;的DataItem = NULL; target元素是'GrayscaleEffect'（HashCode = 4769001）; target属性是'IsEnabled'（类型'Boolean'）

图像效果似乎工作正常，但最新处理绑定错误，我该如何解决？