This is what shows up in your page source:
HTML Code:
<td id="navbar_search" class="vbmenu_control"><a href="search.php" accesskey="4" rel="nofollow">►ARAMA▼</a> </td>
It looks to me like you have Quick Search off. This is part of the line in the template that controls whether you get that dropdown:
HTML Code:
<if condition="$show['quicksearch']"><script type="text/javascript"> vbmenu_register("navbar_search"); </script></if>
So, go through your options and make sure you have it on. Also, look in your templates and make sure that line is there. This is the full line from a default navbar template:
HTML Code:
<td class="vbmenu_control"><a id="navbar_search" href="search.php$session[sessionurl_q]" accesskey="4" rel="nofollow">$vbphrase[search]</a> <if condition="$show['quicksearch']"><script type="text/javascript"> vbmenu_register("navbar_search"); </script></if></td>