How to use xsl:key to get all values?

Hi,

Based on the following XML and XSL file, I'd like to output "1"  "2". But I
just get "1" "1". Any body can tell me what is wrong with
<xsl:key>
Thanks in advance!

Di


<?xml version="1.0"?>
<AA>
	<BB>
		<CC>
			<DD>
				<EE aField="a1" value="1"/>
			</DD>
		</CC>
		<CC>
			<DD>
				<EE aField="a1" value="2"/>
			</DD>
		</CC>
	</BB>
</AA>


<?xml version="1.0"?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns="http://www.w3.org/TR/WD-xsl" version="1.0">

    <xsl:output method="text"/>
    <xsl:key name="key-name" match="EE" use="@aField" />
    <xsl:template match="AA/BB">
        <xsl:for-each select="CC">
 		<xsl:variable name="child" select="key('key-name', 'a1')" />
                     	<xsl:value-of select="$child/@value" />
          </xsl:for-each>
    </xsl:template>

</xsl:transform>


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