How do I bind a data Template Slider to CodeBehind?

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C#

XAML

WPF

I have a DataTemplate which, when referenced, displays a Slider Bar. The setup of the slider is dependant on data passed to the Form from the calling class. The XAML for the config looks like this.

<Window.Resources>
    <DataTemplate  DataType="{x:Type ContentControl}" x:Key="TextBoxTemplate">
        <TextBox Text="{Binding ElementName=MyWindow, Path=m_csValue}" Height="23"/>
    </DataTemplate>
    <DataTemplate DataType="{x:Type ContentControl}" x:Key="SliderTemplate">
        <Slider Name="sli" Value="{Binding ElementName = MyWindow, Path=sli}" ValueChanged="OnSliderValueChanged" IsSnapToTickEnabled="True" Margin="5" /> 
    </DataTemplate>
    <Style TargetType="{x:Type ContentControl}" x:Key="DisplayValues">
        <Setter Property="ContentTemplate" Value="{StaticResource TextBoxTemplate}" />
        <Style.Triggers>
            <DataTrigger Binding="{Binding ElementName=MyWindow, Path=eType}" Value="{x:Static local:eTagDisplay.Text}">
                <Setter Property="ContentTemplate" Value="{StaticResource TextBoxTemplate}" />
            </DataTrigger>
            <DataTrigger Binding="{Binding ElementName=MyWindow, Path=eType}" Value="{x:Static local:eTagDisplay.Slider}">
                <Setter Property="ContentTemplate" Value="{StaticResource SliderTemplate}" />
           </DataTrigger>
        </Style.Triggers>
    </Style>
</Window.Resources>

<Grid Width="267">
    <StackPanel Margin="0,37,0,133" Height="123">
        <TextBlock Height="23" Name="textBlock1" Text="TextBlock" HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </StackPanel>        

    <ContentControl Style="{StaticResource DisplayValues}" Margin="12,12,12,158" />
</Grid>

In my Code Behind I set up the Max, Min, Tick Frequency and Value when the Form is created.
When the Slider bar is updated i find that the slider in the code behind is not bound to the slider on display, and so I'm not updating the value of the object I wish to update.
How can I ensure that the slider created in the XAML is bound to the slider in the code behind?

Regards

Tony