[Zope] question how to access ZCatalog with python

Hi there, I have a catalog with a path- and a field index called path and page_type. in python I call them like this brains = Catalog({'path' : path, 'page_type':'personpage'}) Now I would expect that only records fulfilling both conditions would be returned. However all that mach the first condition are selected. Could somebody tell me where my assumption is wrong,and what remedy is appropriate. Thank you Robert www.redcor.ch