Merging is not working by xsl for 2 xml

Hi,

I tried to merge 2 xml based if /objects/phone/ContactId from merge1.xml
equal to /objects/Contact/Id from merge2.xml with below xsl, both xml are
attached:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:p0="urn:sobject.partner.soap.sforce.com" xmlns:xsi="
http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="xs" version="2.0">
<xsl:output method="xml" indent="yes"/>
<xsl:param name="with" select="document('merge2.xml')"/>
<xsl:template match="p0:objects">
<xsl:for-each select="p0:phone">
<xsl:if test="p0:Phone_Type='Document Uploaded' or p0:Phone_Type='Document
Viewed'">
<xsl:variable name="aaa" select="p0:ContactId"/>
<!--<xsl:if test="exists($aaa=$with/objects/Contact/Id)">-->
<xsl:copy>
<xsl:apply-templates/>
<xsl:copy-of select="$with"/>
</xsl:copy>
<!--</xsl:if>-->
</xsl:if>
</xsl:for-each>
</xsl:template>
<xsl:template match="@* | node()">
<xsl:copy>
<xsl:apply-templates select="@* | node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>

[demime 1.01d removed an attachment of type text/xml which had a name of merge1.xml]

[demime 1.01d removed an attachment of type text/xml which had a name of merge2.xml]