[Zope] newbie zcatalog

[Max M. Stalnaker]

Please consider the following code fragment:

<dtml-if expr="REQUEST.REQUEST_METHOD=='POST'">

<dtml-call "REQUEST.set('ts', ZopeTime())">
<dtml-call "REQUEST.set('id',_.str(_.int(ts)))">
<dtml-call "postings.catalog_object(REQUEST.postingtext,REQUEST.id)">
Classified:<p>
<dtml-var "REQUEST.postingtext">
<p>

On execution, REQUEST.postingtext is displayed as expected.  An object is
placed in the Zcatalog postings as determined by using manage.  However,
clicking on the underlined id of an object in manage yields a traceback
ending in an object not found.  It is sort of expected to display "Hello
World".

Please advise.