Path in a Template Match.

Somehow I am unable to use absolute path in the template match below . Is
this not possible ?. 
If yes, How is it done ?. 
If not, Why ?.

Thanks,
Ashish.

NOTE: edcSystem is the root node.

<xsl:template match = "edcSystem/EDCContract/EDCLegSeq/EDCEqLeg/@a5">
		<xsl:element name = "payerPartyReference">
			<xsl:attribute name = "href">
				<xsl:value-of select =
"generate-id(../../../@a11)"/>    <!-- ********* WORKS FINE ******* -->
				<xsl:value-of select =
"generate-id(/edcSystem/EDCContract/@a10)"/> <!-- ********** DOES NOT WORK
********* -->
			</xsl:attribute>
		</xsl:element>
</xsl:template>

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