[Zope] No Authorization header found

[Tee How Long]

I have try to install Zope 2.0.0.a1 using Apache web server on Redhat   
Linux 5.2, however I am getting the error message as below : -

Traceback (innermost last):
               File   
/usr/local/src/Zope-2.0.0a1-src/lib/python/ZPublisher/Publish.py, line   
255, in publish_module
               File   
/usr/local/src/Zope-2.0.0a1-src/lib/python/ZPublisher/Publish.py, line   
145, in publish
               File   
/usr/local/src/Zope-2.0.0a1-src/lib/python/ZPublisher/BaseRequest.py,   
line 414, in traverse
               File   
/usr/local/src/Zope-2.0.0a1-src/lib/python/ZPublisher/HTTPResponse.py,   
line 540, in unauthorized
             Unauthorized: (see above)
Best regards;
Tee How Long