Check your quiz settings. From Quiz Manager, click Edit next to the Quiz, then from the Quiz Settings tab, make sure show score at end of quiz is checked. I think this should create the quiz results slide. Also check your quiz requirement setting from the same tab. If you specify that a user must pass the quiz, then the continue button will not activate unless they do. Each of these settings sets an expectation that presenter trys to enforce.
I just now had the same problem (well almost... mine would advance after the quiz results page, but the results weren't showing). The solution that worked for me was to delete the Quiz Results page then go into the Quiz Manager and click OK. AP then generated a new Quiz Results page, which worked fine.
Thought I'd post this in case anyone else is searching through the forum because they're having the same problem (or if it happens to me and I forget how I fixed it)!