[Zope] newbie zcatalog

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.