[Koha] recent acquisitions search function

Hello Koha, I think it's a really cool that Koha's main opac allows patrons to view recent acquisitions (acquired in the last 30 days). This works fine for my fiction and non fiction books, but for some reason it won't allow me to search Digital Videodisc and Video Cassette. Instead, it directs me to my server administrator. My administrator can't figure it out either. Has anyone else ever had this problem? Any suggestions? Below is the link to the user site. http://opac.ecla.int/cgi-bin/koha/opac-main.pl Thanks, Nicole Nicole Hatch Programme Coordinator / Librarian European College of Liberal Arts Platanenstr. 24 13156 Berlin +49 30 4373 3124