XSL-FO double line border

I am quite confused with border related tags
associated with XSL-FO. I want a double line border
and using following syntax:
<fo:simple-page-master master-name="contents" 
				page-width="{$pagewidth}mm" page-height="210mm"
				margin-top="0.5cm" margin-bottom="0.5in" 
				 margin-left="1cm" margin-right="2cm">
				 <fo:region-before extent="1cm"/>
				 <fo:region-body margin-top="1cm" 
				 	margin-left="3cm" margin-right="3cm" 
				 	margin-bottom="1cm" background-color="rgb(226,
226, 226)" 
					 border-color="rgb(64, 0, 64)"
border-top-style="double" border-after-style="double"
border-width="10pt" />
				 <fo:region-after extent="1cm"/>
				 	
			</fo:simple-page-master>

But nowhere I can see the double border.
Can anybody help me?

-Ranjan


		
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