slideViewerPro 1.0 - thumbnails won't show up?

slideViewerPro 1.0 - thumbnails won't show up?

Hi there,
I am using slideViewerPro 1.0 for my portfolio, and it worked great when I first uploaded my files.  But now I notice that the thumbs do not show.  How do I fix this?

http://mimshi.com/main_portfolio.html

Thanks!