illegal character data

Hi all, 

I'm trying to do an XML to XML conversion using XSL and xt. However, an
error occurs that I can't explain: 

file:/Baanhelp2xml.xsl:3: illegal data characters inside xsl:stylesheet

I'm using the latest version of XT (I just redownloaded it to make sure).
My (unfinished) stylesheet is:

<?xml version="1.0" encoding="iso-8859-1"?>

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

<xsl:output method="xml"/>

<xsl:template match="session">
	<xsl:element name="Session"><xsl:apply-templates/></xsl:element>
</xsl:template>

<xsl:template match="header">
	<xsl:element name="Header">
		<xsl:element name="Title"><xsl:value-of
select="text/title"/></xsl:element>
		<xsl:element name="SoftCode"><xsl:value-of
select="//session[@id]"/></xsl:element>
	</xsl:element>
</xsl:template>

xsl:template match="vrc"/>

<xsl:template match="text">
	<xsl:element name="HelpTopic">
		<xsl:element name="AimSection"></xsl:element>
	</xsl:element>
</xsl:template>

</xsl:stylesheet>

Thanks for any help! 
Linda van den Brink


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