Folio previews are not for PDFs, they are for DPS articles and folios.
Without knowing what you've done it's pretty hard to tell you what should or shouldn't work.
Thank you for looking at my post. This document has an object state slide show with buttons for the different states. When I export to interactinve PDF the slide show does not work.
Do you know how to get that feature to work in a PDF?
Slide shows created with Object States work in DPS and in Flash (SWF) export. They don't work in a PDF file.
Is there any way to do a slide show effect for a PDF as final output?
Not that I know of.