Set a source of MultiScaleImage control in Silverlight

I am setting the source of an MultiScaleImage control but its not showing up me the imgae.:(

Below is the code ..

   <Grid x:Name="LayoutRoot" >
        <MultiScaleImage Width="100"  Height="100" Source="I开发者_Python百科mage/Chrysanthemum.jpeg" />
    </Grid>

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The multiscaleimage control is expecting to receive a url to xml content created by the Deep Zoom image composer. Its this xml file which contains the references to the tile images that make up a multi-scale image.