sorting date prob

Hi!

First things first. Thanks a lot Jeni for your advices about 
selecting attribute for link value.

Then another question:
I should sort the xml file ascending by the given date.
The xml syntax is like this:
  
<Information>
    <Time>06/04/02</Time> #format is dd/mm/yy
    <Size>299</Size>
    <Sender>Moilanen Jarkko</Sender>
    <Subject id="00223322334342">Xalan</Subject>
</Information>

<Information>
    <Time>05/11/02</Time>
    <Size>45</Size>
    <Sender>Moilanen Jarkko</Sender>
    <Subject id="00223322342334342">Atribuutit linkkeina</Subject>
</Information>

If I try to sort them by xsl:
<xsl:sort order="ascending" select="Time" />

the result is not the correct one.Is there some solution to this, 
or should the xml file be different concerning the syntax?

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