slideshow is not working

I've delleted and reinstalled this twice, for some reason the slideshow isn't working? We had gotten an HTTP error when uploading some photos, and now it won't work...

http://national.provector.us/
and
provector.us

Also, having a problem putting an image file in the header, still seems to show the text as well?

I've uploaded the child theme for showcase as well.

running wp mu 3.2.1 as well as buddypress on the site.