id Function() Error.

I need to access a Node which has an attribute id ( of type ID in the
associated DTD ).

When I use the id() function with the appropriate "id" value ; It gives me
the following error:

ERROR: context does not have an owner document.


Here is what the usage looks like.:
<xsl:transform>
	<xsl:template match="MyRoot">
		<xsl:apply-templates select="MyRootChild"/>
	</xsl:template>
	
	<xsl:template match="MyRoot/MyRootChild">
			<xsl:value-of
select="id('id_of_AnotherMyRootChildNode')"/>
	</xsl:template>
<xsl:transform>

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list