Preview and Multiple Choice Questions

I have some Multiple Choice and T/F questions in storyline and allow the user 2 or 3 chances to get the right answer (depending on the question) but when I preview the slide or the whole scene I never get the second chance. For example, on a T/F I'll purposely answer it incorrectly, i get the pop up message that I should try again but then it won't let me try just moves on to the next slide when i click 'continue'.  What am I doing wrong?

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