I can't save slide marks for slidecast

I synchronized all my slides to the audio, but when I saved and previewed my work, the different set points weren't there. So I have a 12-slide show that shows only the first slide. I can move from slide to slide with the forward arrow, but the audio doesn't move with the slides. There are no slide marks showing in the audio bar. I completely erased all the slide marks, started all over again, and re-saved but got the same miserable result. Any suggestions?
 
sad I’m frustrated
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