Opening search results?

The search function works except for when I click a link in the results. No story shows and the page returns to a blank search page.

Apart from the page header, the search page includes only the code:

<?PHP
   include("newsin/search.php");
?>

You can see the problem at http://www.newsmedianews.com/newsin/search.php
if you simply hit search with an empty box to call up all items and try clicking on a story link.

What am I doing wrong?

Thanks in advance for any help.