[Zope] Python Script Error

He Folks, any Idea what goes wrong ? Site Error An error was encountered while publishing this resource. Error Type: ImportError Error Value: import of "html_quote" from "Products.PythonScripts.standard" is unauthorized. The container has no security assertions. Access to 'html_quote' of (module 'Products.PythonScripts.standard' from 'C:\Program Files\Zope\lib\python\Products\PythonScripts\standard.py') denied. Volker Wend