[Zope] [Zope/DTML] accessing PARENTS url with dtml tag ???

I have found a similar problem at this url: http://mail.zope.org/pipermail/zope/2000-August/115809.html I want to do the same a Kapil, but in DTML. I tried different solutions: 1)<dtml-with "PARENTS[0]"><dtml-var absolute_url></dtml-with> 2)<dtml-var "PARENTS[0].absolute_url()"> but I still have the problem. I wannt to display (in DTML) the absolute URL of the parent, but it doesn't work: it displays the absolute url of the CURRENT object. could you help me to find the solution please? thanks (and excuse for my lack in english)