Small problem with LIMIT

[KTBleeding]

I'm trying to get the last six members to join my forums to show up on the forum home.. I have the basic idea working now, but for some reason the LIMIT isn't working for me.. It's only returning one result.. AKA the last registered member, rather than the last six.

PHP Code:

require_once(DIR . '/includes/functions_user.php');

$newest_members_query = "SELECT userid, username, joindate
    FROM " . TABLE_PREFIX . "user
    ORDER BY userid DESC
    LIMIT 6";

$new_members = $vbulletin->db->query_first($newest_members_query);

if($new_members[userid]){

    $new_members[avatarurl] = fetch_avatar_url($new_members[userid]);
    
    if (!$new_members[avatarurl]) {
    
        $new_members[avatarurl] = $stylevar['imgdir_misc'] . '/noavatar.gif';
        
    } else {
    
        $new_members[avatarurl] = $vbulletin->options['bburl'] . '/' . $new_members[avatarurl][0];
        
    }
}

eval('$newest_members .= "' . fetch_template('newest_members') . '";'); 


Any ideas? I'm stumped. :ermm:
Thanks,