WPF Show and Hide Images with Checked Event

I have several RadioButtons and CheckBoxes in my application and I would like to trigger an event when they are checked. I want an image to pop up on top of another one.

<ListBox Grid.ColumnSpan="3" HorizontalAlignment="Left" Height="102" Margin="28,58,0,0" VerticalAlignment="Top" Width="128" Background="{x:Null}" BorderBrush="{x:Null}">
                    <RadioButton x:Name="classicWhiteRadio" Content="Classic White" HorizontalAlignment="Left" VerticalAlignment="Top" Checked="classicWhiteRadio_Checked"/>
                    <RadioButton x:Name="wholeGrainRadio" Content="Whole Grain" HorizontalAlignment="Left" VerticalAlignment="Top" Checked="wholeGrainRadio_Checked"/>
                    <RadioButton x:Name="tomatoBasilRadio" Content="Tomato Basil" HorizontalAlignment="Left" VerticalAlignment="Top" Checked="tomatoBasilRadio_Checked"/>
                    <RadioButton x:Name="sweetOnionRadio" Content="Sweet Onion" HorizontalAlignment="Left" VerticalAlignment="Top" Checked="sweetOnionRadio_Checked"/>
                    <RadioButton x:Name="garlicButterRadio" Content="Garlic Butter" HorizontalAlignment="Left" VerticalAlignment="Top" Checked="garlicButterRadio_Checked"/>
                </ListBox>

So first of all I set the image's visibility to Hidden.

<Image Name="classicTomatoSauce" Grid.Column="4" Margin="362,138,270,123" Source="classicTomatoSauce.gif" Stretch="Fill" Grid.ColumnSpan="2" Visibility="Hidden"/>
                <Image Name="chipotleSauce" Grid.Column="4" Margin="359,142,267,127" Source="chipotleSauce.gif" Stretch="Fill" Grid.ColumnSpan="2" Visibility="Hidden"/>
                <Image Name="texasBBQSauce" Grid.Column="4" Margin="360,138,270,121" Source="texasBBQSauce.gif" Stretch="Fill" Grid.ColumnSpan="2" Visibility="Hidden"/>
                <Image Name="pestoSaucee" Grid.Column="4" Margin="360,138,275,120" Source="pestoSauce.gif" Stretch="Fill" Grid.ColumnSpan="2" Visibility="Hidden"/>
                <Image Name="honeyGarlic" Grid.Column="4" Margin="356,135,267,121" Source="honeyGarlic.gif" Stretch="Fill" Grid.ColumnSpan="2" Visibility="Hidden"/>

Then I trigger each radio/check box to change the image's visibility like so (when checked):

private void classicWhiteRadio_Checked(object sender, RoutedEventArgs e)
    {
            basePizza.Visibility = System.Windows.Visibility.Visible;
    }

    private void wholeGrainRadio_Checked(object sender, RoutedEventArgs e)
    {
            basePizza.Visibility = System.Windows.Visibility.Visible;
    }

    private void tomatoBasilRadio_Checked(object sender, RoutedEventArgs e)
    {
            basePizza.Visibility = System.Windows.Visibility.Visible;
    }

    private void sweetOnionRadio_Checked(object sender, RoutedEventArgs e)
    {
            basePizza.Visibility = System.Windows.Visibility.Visible;
    }

    private void garlicButterRadio_Checked(object sender, RoutedEventArgs e)
    {
            basePizza.Visibility = System.Windows.Visibility.Visible;
    }

And for some reason they still do not pop up when I test run the application. What could cause this?