Hi Juergen,
have a look to these different causes, it can help: http://docs.moodle.org/22/en/Web_services_FAQ#What_is_the_.27Access_control_exception.27_error
Hi Juergen,
have a look to these different causes, it can help: http://docs.moodle.org/22/en/Web_services_FAQ#What_is_the_.27Access_control_exception.27_error