Search not function properly

My search form can’t function properly, no matter what I key-in and submit, it just go to my blog front page, can anyone help me?

this is my blog http://xiawa.my

and here is the searchform.php

<div id=”search_box”>
<form id=”search_form” method=”get” action=”<?php bloginfo(‘home’); ?>/”>
<input type=”text” id=”s” value=”<?php echo wp_specialchars($s, 1); ?>” class=”swap_value” />
<input type=”image” src=”<?php bloginfo(‘stylesheet_directory’); ?>/images/search-btn.gif” width=”24″ height=”24″ id=”go” alt=”Search” />
</form>
</div>