[Zope-CMF] CMFComplexDocument Install problem

[rickpolus]

I have just installed CMFComplexDocument and receive the following 
error in the Zope managment interface in its Product folder:

Traceback (most recent call last):
  File "/usr/local/Zope-2.5.0-linux2-
x86/lib/python/OFS/Application.py", line 531, in import_product
    product=__import__(pname, global_dict, global_dict, silly)
  File "/usr/local/Zope-2.5.0-linux2-
x86/lib/python/Products/CMFComplexDocument/__init__.py", line 9, in ?
    import ComplexDocument
  File "/usr/local/Zope-2.5.0-linux2-
x86/lib/python/Products/CMFComplexDocument/ComplexDocument.py", line 
20, in ?
    from Products.CMFCore.WorkflowCore import WorkflowAction, 
afterCreate
ImportError: cannot import name afterCreate

Zope version: 2.5.0
CMF version: 1.3-beta1

How do I fix this?

Thanks

Rick.