[Zope] Role specific access rights for Python scripts

Hello, I try to set up a user role which is allowed to vie the output of some python scripts in a certain folder. I created a new role and started by checking every single checkbox for this role in the "Security" tab of the new script. But if I select the URL of the script I get: Zope has encountered an error while publishing this resource. Error Type: Unauthorized Error Value: You are not allowed to access manage_test in this context Any hint, what might be wrong here? Kind regards Andreas.