it seems there is a problem with a plugin you use, because our theme dont use the jQuery block ui. Where is the problem, front end or admin back end? Have you already tried to deactivate all plugins?
Have you already set the slider and the slideshow source (pictureset) on the page where you want to show the slider? If this is not the problem, can you send us the link to your website, then we can take a look at it.