I just checked on your site.
I think there is either a htaccess or an apache rule set incorrectly, because when I tried to access the timthumb url I get the following error:
I'm not sure if this is a permission problem or something else, but you should definitely contact the server administrator. The timthumb library is never executed, because the server does not allow reaching it from the outside.
One thing you should probably try though is to set the permissions on the /wp-content/plugins/ajax-search-pro/includes/timthumb.php file to 777. If it's not blocked via SSH, then it might help.Best,
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