xsl:sort .::RESOLVED::.

[Ashes]

Hi.

I'm trying to sort a node by an attribute of it's last child.
The way I understand things, the following code SHOULD work, but it only sorts the nodes in the reverse order they were entered, and not by the date & time.

xsl template extract

<xsl:template match="topic" mode="toc">
	<xsl:apply-templates select="subject" mode="toc">
		<xsl:sort select="message[last()]/@dd" data-type="number" order="descending"/>
		<xsl:sort select="message[last()]/@mm" data-type="number" order="descending"/>
		<xsl:sort select="message[last()]/@yyyy" data-type="number" order="descending"/>
		<xsl:sort select="message[last()]/@time" data-type="number" order="descending"/>
	</xsl:apply-templates>
</xsl:template>

xml file extract

<forum>
  <category name="Category 1 New new" dd="13" mm="11" yyyy="2002" time="15:57:42" type="c" id="1">
    <topic name="New" description="Testing 55" username="ashleym" alias="Ashes" dd="13" mm="11" yyyy="2002" time="15:50:06" type="t" id="1">
      <subject name="blah" username="ashleym" alias="Ashes" read="52" dd="13" mm="11" yyyy="2002" time="15:12:47" type="s" id="1">
        <message username="ashleym" alias="Ashes" dd="13" mm="11" yyyy="2002" time="15:12:47" type="m" id="1">[}:)]</message>
        <message username="ashleym" alias="Ashes" dd="13" mm="11" yyyy="2002" time="15:12:58" type="m" id="2">hu????</message>
        <message username="ashleym" alias="Ashes" dd="13" mm="11" yyyy="2002" time="15:13:03" type="m" id="3">what?</message>
        <message username="ashleym" alias="Ashes" dd="13" mm="11" yyyy="2002" time="15:13:33" type="m" id="4">not you again</message>
        <message username="ashleym" alias="Ashes" dd="13" mm="11" yyyy="2002" time="15:51:06" type="m" id="5">Oh yes[;)]</message>
        <message username="ashleym" alias="Ashes" dd="14" mm="11" yyyy="2002" time="09:19:24" type="m" id="7">blah</message>
        <message username="ashleym" alias="Ashes" dd="14" mm="11" yyyy="2002" time="10:37:39" type="m" id="10">hey?</message>
      </subject>
    </topic>
  </category>
</forum>

Sorry I don't really know how to explain this any better.
Any help will be appreciated.
Thanks