Sorting XML into a Hierarchy

[csharp]

I am generating an xml file off an employees table from a database to
use to databind a treeview to on a master page rather than call the db
every time the page loads.

I need to take this XML and sort it hierarchially so when the treeview
gets it, it shows all employees sorted with child nodes for employees
who report to them, etc.

I have never worked with XML but found enough online to assume an xsl
file would do the trick, provided it was written correctly.

What I have so far, thats not working, is this.


CODE TO GENERATE XML FILE FROM DB

DataSet SQLDataset = new DataSet("Employees");
SqlDataAdapter DBAdapter = new SqlDataAdapter("Select * FROM
tm2Employee", dbConn);
DBAdapter.Fill(SQLDataset);
SQLDataset.WriteXml(System.AppDomain.CurrentDomain .BaseDirectory +
"xml.xml", XmlWriteMode.WriteSchema);

//sort the XML Hierarchically
XslCompiledTransform xsltransform = new XslCompiledTransform();
xsltransform.Load(System.AppDomain.CurrentDomain.B aseDirectory +
"xsl.xsl");
xsltransform.Transform(System.AppDomain.CurrentDom ain.BaseDirectory +
"xml.xml", System.AppDomain.CurrentDomain.BaseDirectory + "xml2.xml2");
SAMPLE OF XML FILE GENERATED

<Employees>
<Table>
<LoginID>LEGAL\SmithJS</LoginID>
<EmployeeName>Smith, John</EmployeeName>
<EmployeeID>111111</EmployeeID>
<DOB>1980-07-23T00:00:00-04:00</DOB>
<AuthLevel>3</AuthLevel>
<ReportsTo>222222</ReportsTo>
</Table>
</Employees>

XSL FILE

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="ReportsTo" match="Employee" use="@ReportsTo"/>
<xsl:template match="/">
<Employee>
<xsl:for-each select="key('ReportsTo','0')">
<xsl:call-template name="recurse"/>
</xsl:for-each>
</Employee>
</xsl:template>
<xsl:template name="recurse">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:if test="key('ReportsTo',@id)">
<Employee>
<xsl:for-each select="key('ReportsTo',@id)">
<xsl:call-template name="recurse"/>
</xsl:for-each>
</Employee>
</xsl:if>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>


ENVIRONMENT

ASP.net 2.0
MSSQL Server 2000
Windows Server (unsure of version)