Thanks Lilybiri, I know this was posted a while back, but you saved me today! 
My quiz scope was preventing my jump to slide from working. Essentially the quiz scope ends in your deck on the last slide that has a scorable field. Captivate 5 wasnt allowing me to jump beyond that point from eariler in the deck. Ex: My menu was on slide 4. I had a single scorable click box (for LMS SCORM reasons) on slide 75. And my last menu item was trying to jump to slide 76. I found I could not jump to anything beyond 75. I Simply moved the scorable object to slide 76 (or could have been even further out as needed), and its working again.
If you have nothing scorable, quiz scope shouldn't affect jump to, at least that's been my experience in the past. You can check using the F9 (advanced interactions) and look in the "Include in quiz" column for the YESs.