Media Files not inserting into site

Hi, I am using Catch Kathmando Pro and uploaded a new site onto the web yesterday. http://www.whiskey-tours-ireland.com/ When I first loaded it up the favicon was not displaying. I deleted it and tried to re-insert it but it does not work. My media files are all in the media library. But when I select a file to use as a favicon it does nothing. The attachment details disappear and nothing happens, no error messages appear. The problem seems to be the same with all items in the media library. Any ideas?