Feedback and Advance when Correct

I'm setting up a course that has short quizzes throughout. We'd like to have feedback for wrong answers, and only allow students to continue when the question is correctly answered.I've tried turning on feedback for each question and setting a variable on the next page click to occur only if the question is correct. With this setup the action works (advance only when correct), but I can't get feedback to work if the answer is incorrect.I'm running Enterprise 2006.I assume this is a rather basic function, but I can't find any similar setups here. Thanks.