I am rying to change the images in the 3-d rotater on the home page

I have gone into Showcase and chosen 3-d slider image options (the last drop down). I have made sure that image1.jpg was named the same as image1.jpg in my galleries. Still says that it is loading first image. When you say put the folder url in the available spot, is it the path under that folder in my gallery that goes in the destination blank?

I may be in over my head here but once I get this all figured out, I plan to open up 25-50 of these sites over the next 12 months so I appreciate your patience with this first one. I am definately facing a learning curve here.