FCKEDITOR and Mediawiki

Hi, I am trying to configure FCKeditor with Mediawiki and I am having a hard time. I was wondering can anybody help me here.

Here are the steps that I haev taken till date
Settings in my LocalSeettings.php file

# This file is used for FCKeditor
require_once("$IP/extensions/FCKeditor/FCKeditor.php");
$wgUseAjax = 'true';

$wgShowExceptionDetails = true;


Here is the error message that I am seeing
Detected bug in an extension! Hook FCKeditor_MediaWiki:: onCustomEditor failed to return a value; should return true to continue hook processing or false to abort.
Backtrace:
#0 /usr/share/mediawiki/includes/Wiki.php(502): wfRunHooks('CustomEditor', Array)
#1 /usr/share/mediawiki/includes/Wiki.php(63): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#2 /usr/share/mediawiki/index.php(116): MediaWiki->initialize(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#3 {main}


------------Steps that I took to install FCKeditor extension


Copied the FCKeditor folder after unzipping to to /var/lib/mediawiki/extensions/FCKeditor

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Please look into this and let me know what needs to be done.
Software on my Wikiserver
MediaWiki 1.15.1
PHP 5.3.2-1ubuntu4.2 (apache2handler)
MySQL 5.1.41-3ubuntu12.1
Ubuntu Server 10.04