Plugin kann nicht Deaktiviert werden

Code:
<?php



/**

 * Skype MyBB! plugin for MyBB 1.4.x

 * @author mavericck

 * @name Skype MyBB!

 * @version 1.4.1

 * @copyright Copyright (c) 2010, mavericck

 * @license http://www.gnu.org/licenses/gpl.txt GNU Public License

 */



/*

    This program is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation, either version 3 of the License, or

    (at your option) any later version.



    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.



    You should have received a copy of the GNU General Public License

    along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/



// Disallow direct access to this file for security reasons

if(!defined('IN_MYBB'))

{

    die('Direct initialization of this file is not allowed.<br /><br />Please make sure IN_MYBB is defined.');

}



define('SKYPE_MYBB_DEFAULT_ACTION', 'call'); // choose between call/chat



$plugins->add_hook('postbit',              'skypeMybbParse');

$plugins->add_hook('postbit_pm',           'skypeMybbParse');

$plugins->add_hook('postbit_announcement', 'skypeMybbParse');

$plugins->add_hook('postbit_prev',         'skypeMybbParse');



function skypeMybb_info()

{

    return array('name'          => 'Skype MyBB!',

                 'description'   => 'Add a Skype&trade; status button to users posts, useful to start a call/chat',

                 'website'       => 'http://mybboard.it',

                 'author'        => 'mavericck',

                 'authorsite'    => 'http://mybboard.it',

                 'version'       => '1.4.1',

                 'guid'          => '66f9a95ec9fba2eb78c8a4448ad2bd16',

                 'compatibility' => '16*'

                );

}



function skypeMybb_activate()

{

    global $db;

    include MYBB_ROOT . '/inc/adminfunctions_templates.php';



    $skypeProfileField = array('name'        => 'Skype&trade; ID',

                               'description' => 'The unique ID used to connect to Skype',

                               'disporder'   => '4',

                               'type'        => 'text',

                               'length'      => '0',

                               'maxlength'   => '255',

                               'required'    => 0,

                               'editable'    => 1,

                               'hidden'      => 0,

                               );



    $db->insert_query('profilefields', $skypeProfileField);

    $skypeFid = (int) $db->insert_id();



    $db->query('ALTER TABLE ' . TABLE_PREFIX . 'userfields ADD fid' . $skypeFid . ' TEXT NOT NULL');



    $skypeMybbSetting1 = array('name'        => 'skype_mybb_fid',

                               'title'       => 'Skype profile field ID',

                               'description' => 'Unique ID of Skype profile field',

                               'optionscode' => 'text',

                               'value'       => $skypeFid,

                               'disporder'   => '1',

                               'gid'         => '0',

                               );



    $db->insert_query('settings', $skypeMybbSetting1);

    rebuildsettings();



    $find     = '#' . preg_quote('{$post[\'button_email\']}') . '#';

    $replace  = '{$post[\'fid' . $skypeFid . '\']}{$post[\'button_email\']}';



    find_replace_templatesets('postbit', $find, $replace, 1);

    find_replace_templatesets('postbit_classic', $find, $replace, 1);

}



function skypeMybb_deactivate()

{

    global $db, $mybb;

    include MYBB_ROOT . '/inc/adminfunctions_templates.php';



    $find    = preg_quote('{$post[\'fid' . $mybb->settings['skype_mybb_fid'] . '\']}');

    $find    = '#' . $find . '#';

    $replace = '';



    find_replace_templatesets('postbit', $find, $replace, 0);

    find_replace_templatesets('postbit_classic', $find, $replace, 0);



    $db->query('ALTER TABLE ' . TABLE_PREFIX . 'userfields DROP fid' . $mybb->settings['skype_mybb_fid']);

    $db->delete_query('profilefields', "name = 'Skype&trade; ID'");

    $db->delete_query('settings', "name = 'skype_mybb_fid'");

}



function skypeMybbParse($post)

{

    global $mybb;



    $skypeFid = $mybb->settings['skype_mybb_fid'];



    if (isset($post["fid$skypeFid"]) == true && $post["fid$skypeFid"] != '')

    {

        $post["fid$skypeFid"] = '<a href="skype:' . $post["fid$skypeFid"] . '?' . SKYPE_MYBB_DEFAULT_ACTION . '" title="Start a ' . SKYPE_MYBB_DEFAULT_ACTION . ' with ' . $post["fid$skypeFid"] . ' in Skype&etrade;"><img src="http://mystatus.skype.com/smallclassic/' . $post["fid$skypeFid"] . '" /></a>';

    }

}



?>