[Zope] XML Document changing security error

[julio dinis]

Hi all,
When I try to change security permissions to a specific node of a xml 
document tree created with XMLDocument1.0a2 I get this error:

Traceback (innermost last):
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 214, in publish_module
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 179, in publish
File /usr/local/src/Zope-2.0.1-linux2-x86/lib/python/Zope/__init__.py, line 
201, in zpublisher_exception_hook
(Object: Manageable)
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 165, in publish
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/mapply.py, 
line 160, in mapply
(Object: manage_changePermissions)
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 102, in call_object
(Object: manage_changePermissions)
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/AccessControl/Role.py, 
line 247, in manage_changePermissions
(Object: Manageable)
File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/AccessControl/Permission.py, 
line 171, in setRoles
AttributeError:

This problem cant let me put anonymous user to browse same childnode.
Only with superuser I can browse the DOM tree, even Manager Role cant.

Can be a XMLDocument1.0a2's problem or with my specific xml document?

Can anyone help me,
thanks

Júlio Silva

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