Go back in and select Slideshow. When it opens look over to the right, near the middle but in the top half of the page. There's a box in pale green with a large arrow pointing right - click on that and it moves them on.

You have to click the arrow for each picture. It doesn't automatically select the next image like other sites do.

Many thanks, friends. I never look on the right, because it's usually ads! I was looking for the arrow right by the picture.