How do you set a Translate Transform to an ImageBrush within a Path?

I have the following simple path. But everytime in Expression Blend I try and set a translate transform to its image brush the image disappears. Ideally the fill should be no开发者_运维知识库ne. I need to dynamicly set the x and y of the image within the brush if possible. If you have done this in C# that would be fine as well. Or am I mistaken and this just cant be done?

<Path Data="M0.5,0.5 L99.5,0.5 L99.5,439.5 L0.5,439.5 z" Fill="#BFF31313" Height="440" Canvas.Left="192" Stretch="Fill" Stroke="Black" Canvas.Top="176" Width="100" Visibility="Collapsed">
    <Path.Fill>
        <ImageBrush ImageSource="4x4.png" Stretch="None"/>
    </Path.Fill>
</Path>

Something like this?

<Path Data="M0.5,0.5 L99.5,0.5 L99.5,439.5 L0.5,439.5 z" Fill="#BFF31313" Height="440" Canvas.Left="192" Stretch="Fill" Stroke="Black" Canvas.Top="176" Width="100" Visibility="Collapsed">
    <Path.Fill>
        <ImageBrush ImageSource="4x4.png" Stretch="None">
            <ImageBrush.Transform>
                <TranslateTransform X="10" Y="10"/>
            </ImageBrush.Transform>
        </ImageBrush>
    </Path.Fill>
</Path>