[Zope] CMF problem... adding news

[Mehmet Yousouf]

I have installed CMF 1.0 on Zope 2.3.1.2beta and everything seems to work 
well (it is very impressive) except when I try to add news.... I select a 
news item to add, do everything including submit and it shows up as published 
but when I go to the home page or the news page I get an error of:
 
Error Type: TypeError
Error Value: call of non-function (type IOBTree)
Traceback (innermost last):
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 223, in publish_module
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 187, in publish
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/Zope/__init__.py, line 
221, in zpublisher_exception_hook
    (Object: Traversable)
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 171, in publish
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/mapply.py, 
line 160, in mapply
    (Object: index_html)
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 112, in call_object
    (Object: index_html)
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/OFS/DTMLMethod.py, line 
189, in __call__
    (Object: index_html)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_String.py, 
line 538, in __call__
    (Object: index_html)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_With.py, 
line 146, in render
    (Object: portal_properties)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/Products/CMFCore/FSDTMLMethod.py, 
line 213, in __call__
    (Object: news_box)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_String.py, 
line 538, in __call__
    (Object: news_box)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_In.py, 
line 483, in renderwb
    (Object: portal_catalog.searchResults( meta_type='News Item'
                                        , sort_on='Date'
                                        , sort_order='reverse'
                                        , review_state='published'
                                        ))
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_Util.py, 
line 334, in eval
    (Object: portal_catalog.searchResults( meta_type='News Item'
                                        , sort_on='Date'
                                        , sort_order='reverse'
                                        , review_state='published'
                                        ))
    (Info: portal_catalog)
  File <string>, line 0, in ?
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/Products/CMFCore/CatalogTool.py, 
line 196, in searchResults
    (Object: Traversable)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/Products/ZCatalog/ZCatalog.py, 
line 530, in searchResults
    (Object: Traversable)
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/Products/ZCatalog/Catalog.py, 
line 654, in searchResults
  File 
/home/mehmety/Zope-2.3.0-linux2-x86/lib/python/Products/ZCatalog/Catalog.py, 
line 608, in _indexedSearch
  File /home/mehmety/Zope-2.3.0-linux2-x86/lib/python/SearchIndex/UnIndex.py, 
line 443, in keyForDocument
TypeError: (see above)

 I am running python 1.5.2. on linux (Mandrake 7.2)
I am also sure that when I first installed CMF the news publishing worked 
fine.... 

Anyone know what happened/is happening?

TIA, Mehmet