MS Word Plug-in not respecting dynamic image url

I have created an rtf template for BI Pub, using the MS Word plug-in.  I am using the xslt script I found online:

<?xdoxslt:set_variable($_XDOCTX, 'x', ‘\\ServerLocation\image1.bmp’)?> and url:{xdoxslt:get_variable($_XDOCTX, 'x')}

This should display the image1 in my PDF document.

When I run the PDF viewer for the template with a Filed from my XML data (the field contains the image url address pulled from the Media Objects file), I only get the path address displayed as text.  But, when I copy that path address text & paste it into the xslt code as Static text, I then see the image.