I've just downloaded your questionnaire module from the modules page and installed it on my test site.
I can add instances of questionnaire to courses, but cannot access the /mod/questionnaire/phpESP page. Even though I am logged in as the Moodle admin, I am asked to log in again. When I do that, I get redirected to the main page of my Moodle installation and can't navigate to the phpESP page, because I am asked to log in again... and so it goes on and on

Any ideas?