Your page with ajaxSearch is a copy/paste of a ajaxSearch demo page.
I found the following css call in your page:
<script type="text/javascript" src="/assets/snippets/searchWords/js/searchWords.js"></script>
<script type="text/javascript" src="/assets/snippets/ajaxSearch/js/ajaxSearchCmt.js"></script>
<script type="text/javascript" src="/assets/snippets/ajaxSearch/js/mootools1.2/mootools.js"></script>
<script type="text/javascript" src="/assets/snippets/ajaxSearch/js/ajaxSearch-mootools1.2.js"></script>Why do you use assets/snippets/searchWords/js/searchWords.js ?? This js script comes from the demo site and is used to manage the display of some words. It’s not a part of ajaxSearch!
Have you read the wiki documentation available on this page:
http://wiki.modxcms.com/index.php/AjaxSearch
What is your ajaxSearch snippet call ?
On your site I see: [!AjaxSearch? &ajaxMax=`4` &showMoreResults=`1` &moreResultsPage=`217` &AS_landing=`274`!]
If this snippet call is not parsed it is probably because you have some weird characters in your snippet call (check the blank characters).