Coursepress course completion

i usually create courses with content splitted in units and in the end an unit with a quiz and another with a survey.
What is happening is that even after the user answer all questions of the quiz corretctly, it goes to a page with my last unit title, but with no content. I have already deleted this unit and recreated but it didnt worked. Do you have any other reports with the same problem? Can you help me solve it?