Why can't I open and edit my subtopics?



Im creating a Prezi. And now, after some hours of work, when i click in my slides they wont open anymore in the main screen, i click on them and they doesnt apper in the right side of the screen, how can i unlock them: it appears that only the first one is available do edit, i can still see them in the presentation, but i cannot access them to edit them.


Could you please share the link of your presentation with me so that I could have a look?