XSLT Transformation Problem with disable output escaping

<root>
   <node>
     <!--
            <a href="mailto:[email protected]"> Mail me </a>
      -->
</node>
</root>

<xsl:template match="/">
<xsl:value-of select="/root/node/comment()" disable-output-escaping="yes"/>
</xsl:template>

cristi:tmp diciu$ xsltproc test.xsl test.xml
<?xml version="1.0"?>

        <a href="mailto:[email protected]"> Mail me </a>

<xsl:template match="ahrefmail/comment()">
    <xsl:element name="a">
        <xsl:attribute name="href" select="../../mail"/>
        <xsl:attribute name="class" select="'text'"/>
        <xsl:text>Mail Me!</xsl:text>
    </xsl:element>
</xsl:template>

<?xml version="1.0" ?>
  <root>
    <institution id="1">
    	<data>
    	<ahrefmail>
    		<!--
        <a href='mailto:[email protected]' class='text'></a>
             -->
    	</ahrefmail>

    	<mail>
    		[email protected]
    	</mail>
    	</data>
    </institution>


    <institution id="2">
    	<data>
    	<ahrefmail>
    		<!--
        <a href='mailto:[email protected]' class='text'></a>
        -->
    	</ahrefmail>

    	<mail>
    		[email protected]
    	</mail>
    	</data>
    </institution>

</root>