Content gallery not working

[bieke81]

I have the featured content gallery on my site: http://www.solarpowerinstallation.org, but it's not working properly. The images aren't showing in the form of a "slideshow" (don't know how to describe it really), but are on top of each other. I have deleted the plugin and re-installed it. i saw someone with the same problem that was missing a certain file, but this isn't the case with me. Can someone help me with this problem?

Leslie