XSL-FO scaling embedded SVG

I'm just getting my feet wet with XSL-FO. I have created a document using FOP that embeds an SVG file which I would like to shrink a little. I have tried using the 'inline-progression-dimension' and 'block-progression-dimension' attributes (see below). While the document is sucessfully created with the SVG embedded, the scaling does not seem to be working. Is this a FOP peculiarity, or am I missing something about scaling that's causing this?
Thanks.


<fo:external-graphic inline-progression-dimension="2in" block-progression-dimension="1in" content-width="scale-to-fit" content-height="scale-to-fit" src="url(H:\workinprogres\svg\dial-guage.svg)"/>
-- 
Charles Knell
cknell@xxxxxxxxxx - email

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