Why search feature isn\'t working? Even the demo site the search dont works.

jsjobsdemo.joomshark.com/index.php?optio...t=jobsearch&Itemid=6

Here is my site:
www.funger.oraculo.org/jobsearch

I desactivate SEO and nothing to search works.

What is could be? Someone already has this same issue?

I make a new install and now everything is working fine.