I have tried everything I can think of to get captions to display beneath their slides, but I can succeed only by drastically lowering the height of the slide images themselves, down to 110 pixels. The slide images are actually 155 pixels high. But when that is the height value specified in settings, then the captions appear to be covered over by the slide.
It's as if the vertical height allocated to the slides is just too little to allow for both the slide itself plus the caption just beneath.
I've searched the forums for suggestions, but have found nothing.
You can see the problem at http://www.ecocubanetwork.net (I had to make the slides very small in order to get the captions to display.)