Trying to go Back from quiz slides doesn't work. Why??

Question

This problem was posted earlier today by another user, but no
one has submitted a solution:
http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?forumid=67&catid=464&threadid =1417905&enterthread=y
I'm having the same problem and hoping that re-posting will
knock the answer down from the trees.
Problem: I insert quiz slides at the end of my lesson file.
In the compiled file, once I reach the quiz slides, if I use use
the Back button, playbar, or menu to move back to an earlier slide,
I can no longer access the quiz slides. There is just no reaction
to pressing the Forward button or using the menu. The playbar jumps
past the quiz slides in both directions and doesn't even show the
numbering (18/25, etc) anymore for the quiz slides.
Does anyone have any insight as to why this is happening?
Thanks.

Answer 1

AFter some experimentation, discovered the following:
Go to Quiz > Quiz Preferences. Under Settings, there is a
"Allow user to review quiz" check box. Under Pass or Fail, there is
an "Infinite attempts" check box. I had both of these unselected.
Here's what happens when you select or deselect one or both:
Review + 1 attempt: User starts to answer questions, and then
backs up. User can go forward again. Answered questions still
display the answers. Once reaches unanswered questions, they are
now locked.
Review + Infinite: User starts to answer questions, and then
backs up. User can go forward again. All answers to questions
erased and user can answer all questions.
No Review + 1 attempt: User starts to answer questions, and
then backs up. User can't go forward again. (This was the situation
encountered.)
No Review + Infinite: Same as Review + Infinite.