Livesearch working on local but not online

Hi,

I’ve been trying to use an ajax livesearch plugin. So I made an local installation on WP 2.3 on a windows/apache/php/mysql platform. Everything is working just fine.

But when I moved the wordpress to my hosting server, installing WP 2.3 and the same plugins, the livesearch stopped working.

I tried with several different plugins and all returns no results when searching.

Trying to debug the problem I managed to see a little bit of code that is not working right on my server, but it’s working fine on local machine.

The code is like this:

<?php $posts_per_page = 15; global $table_prefix; require('../../../wp-blog-header.php'); ?>
<div class="LSRes"><?php if ($posts) { foreach ($posts as $post) { start_wp(); ?>
<div class="LSRow"><a href="<?php echo get_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>"><?php the_title(); ?></a>
</div><?php } } else { ?>No Results<?php } ?>
<div>
<div class="LSRes"><a href="<?php bloginfo('url'); ?>/index.php?s=<?php echo wp_specialchars($s); ?>">More Results...</a></div>

It’sa bit of piece from this plugin:
https://www.cneophytou.com/2006/03/26/livesearch/

The $posts is 0 when it should have data in it.

Also I tried with this plugin:
https://1stein.org/2007/09/11/live-search-popup/
Where the code that actually makes the search is very similar with the previous one.

<?php 

$posts_per_page = 10;
global $table_prefix;
require('../../../wp-blog-header.php'); ?>

<?php if ($_GET['s'] != '') {
	if (count($posts) > 0) {
		echo '<ul id="resultlist">';
		foreach ($posts as $post) {
			start_wp(); ?>
			<li class="resultlistitem"><a href="<?php echo get_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>"><?php the_title(); ?></a></li>
<?php
		}
		echo '</ul>';
	} else {
		echo '<p>No Results.</p>';
	}
}
?>

Also, with this I get no results.

I am not able to spot what would be the difference between the instalation on local and the one on the remote hosting server, both have the same plugins, the same posts…

A little help please? ??
Thank you!