why is XslCompiledTransform adding a date to xml document?

[xpblueScreenOfDeath]

I have an xml and xslt document. What I want to do is use the xslt document to transform the xml into another format so I can read it into a dataset. When I use XslCompliedTransform to transform the document it adds a date to the transform document so that it throws an exception that the root element is missing.

code:

                XPathDocument xpathDoc = new XPathDocument("xdoc.xml");
                XslCompiledTransform transform = new XslCompiledTransform();
                XsltArgumentList args = new XsltArgumentList();
                System.IO.FileStream file = new System.IO.FileStream("queryGroup.xml", System.IO.FileMode.Create);
                DataSet ds = new DataSet();
                System.IO.MemoryStream memStream = new System.IO.MemoryStream();
                byte[] content;
                XmlReader reader = XmlReader.Create(memStream);

                args.AddParam("queryType", "", comboBox1.SelectedValue);
                transform.Load("xtrans.xslt");
                transform.Transform(xpathDoc, args, memStream);

                content = memStream.ToArray();
                file.Write(content, 0, content.Length);
                file.Close();

                ds.ReadXml(memStream);

after transform:

<?xml version="1.0" encoding="UTF-8" ?>
2006-09-19 17:29:33.917
<items>
  <item>
     <code>298</code>
     <description>Name Index</description>
  </item>
</items>

xslt:

<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="[URL unfurl="true"]http://www.w3.org/1999/XSL/Transform">[/URL]
	<xsl:param name="queryType" select="'History'"/>
	<xsl:template match="/records/formats">
		<items>
			<item>
				<code></code>
				<description></description>
			</item>
			<xsl:for-each select="format[type = ($queryType) and not(query_id = (preceding-sibling::format)/query_id)]">
				<item>
					<code>
						<xsl:value-of select="query_id"/>
					</code>
					<description>
						<xsl:value-of select="query_desc"/>
					</description>
				</item>
			</xsl:for-each>
		</items>
	</xsl:template>
</xsl:stylesheet>