Join XMLs with XLST with ralative data

HI Everybody ,
I am very new to this list,
As I was going thru the archive , I found the way to
join the 2 or more XML docs  using ?copy? and ?key?
element.
I used it in my program , but it seems not working
well . I don?t know Where I went wrong . 
The two xml doc that I want to join are 

22.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="stock.xslt"?>
<STKAVAILABLE>
	<STKMAST Alias="01" STKCODE="31>
		<STKCODE IndexID="5011"/>
		<STKDESC IndexID="5017"/>
	</STKMAST>
	<STKMAST Alias="01" STKCODE="30">
		<STKCODE IndexID="5011"/>
		<STKDESC IndexID="5017"/>
	</STKMAST>
	<STKMAST Alias="01" STKCODE="32>
		<STKCODE IndexID="5011"/>
		<STKDESC IndexID="5017"/>
	</STKMAST>
</STKAVAILABLE>

buy22.xml
<?xml version="1.0" encoding="UTF-8"?>
<buyermaster>
	<name id="a001" deptid="01">
		<address/>
		<bstkcode>31</bstkcode>
	</name>
	<name id="a010">
		<address/>
		<bstkcode>31</bstkcode>
	</name>
	<name id="a003" deptid="10">
		<address/>
		<bstkcode>40</bstkcode>
		<bstkcode>20</bstkcode>
		<bstkcode>35</bstkcode>
	</name>
</buyermaster>
I am using join.xslt 
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="rows-bstkcode" match="bstkcode"
use="bstkcode" />
<xsl:variable name="x_22" select="document('22.xml')"
/>
<xsl:variable name="buy22"
select="document('buy22.xml')" />
<xsl:template match="/">
<tran>
  <xsl:for-each select="$x_22/STKAVAILABLE/STKMAST">
    <xsl:copy>
      <xsl:copy-of select="@*" />
      <xsl:variable name="STKCODE" select="@STKCODE"
/>
      <xsl:for-each select="$buy22">
        <xsl:copy-of select="key('rows-bstkcode',
$STKCODE)
        				/*[name() != 'bstkcode']" />
        				
      </xsl:for-each>
    </xsl:copy>
  </xsl:for-each>
 </tran> 
 </xsl:template>
</xsl:stylesheet>

And I want xml or HTML out put like this 
<tran>
<STKMAST STKCODE="31" >	<!?from 22.xml>
<name id="a001"/>       < !?Corresponding buyer id
from buy22.xml-->
<name id="a010"/>
</STKMAST>
</tran>
but with my join.xslt I am getting following out put (
xml)
<?xml version="1.0" encoding="UTF-8" ?> 
<tran>
 	 <STKMAST Alias="01" STKCODE="31" /> 
  	<STKMAST Alias="01" STKCODE="30" /> 
  	<STKMAST Alias="01" STKCODE="32" /> 
</tran>
Pls Help me 
TIA
Mangesh



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