[Zope] automatically reindexing one catalog

[Dianne Van Dulken]

Hi everyone, 

Yet another problem from me.

I have two catalogs (one for merchants, one for items).

Whenever I make a change to the information in these catalogs, I want to
automatically reindex the correct one.  The merchant one does this, but, for
some reason, the items one doesn't.  

Does anyone know how I can define which catalog I want to reindex?  I've
tried <dtml-with ItemCatalog>, dtml-in, but can't work out what I am doing
wrong.  It just sits there with old data in it.

Thanks!

Di