something terrible about zope-cps-cpscourrier

hello,
  I downloaded cps 3.0 and zope 2.6.2 that I installed on windows XP. I copied the contents of CPS 3.0 in lib/python/products. the list of the products appears well in the drop-down menu, but however, when I want to install CPSSchema, the system announces me an error.
   
  is someone willing or available to help me?
   
   
              Site Error  An error was encountered while publishing this resource. 
  Resource not found
Sorry, the requested resource does not exist.   Check the URL and try again.
  Resource: http://127.0.0.1:8080/cps/manage_addProduct/CPSSchemas/manage_addCPSSchema
  
---------------------------------
    Troubleshooting Suggestions
    
   The URL may be incorrect.   
   The parameters passed to this resource may be incorrect.   
   A resource that this resource relies on may be encountering an error. 
  For more detailed information about the error, please refer to the error log. 
  If the error persists please contact the site maintainer. Thank you for your patience. 
(Also, an error occurred while attempting to render the standard error message.)

       
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