[Zope-dev] More ZPatterns confusion

I am trying to add a ZClass with a DataSkin Property sheet to a Virtual Rack. So I call the following: <dtml-let ni="newItem(key=REQUEST['key'])" props="ni.propertysheets.get('Basic')"> <dtml-call "props.manage_changeProperties(REQUEST.form)"> </dtml-let> I assume this should call ADDED and CHANGE trigger's to place data in my SQL Database. Unfortunately this is not happening. The ADDED trigger is doing the initial creation, but the changeProperties is not effecting the right changes. It seems that the CHANGE trigger is not getting called. Is there something else I should be doing? Thanks for all the help