MediaWiki: 1.6.10 + FCK editor

Hi :
First of all, Excuse me for my poor English, I speak Spanish.

I have MediaWiki: 1.6.10 installed and when I try to install mediawiki_fckeditor_ext_N I got this error :

Warning: main(/www/MYSERVER/htdocs/wiki/includes/ParserOptions.php) [function.main]: failed to open stream: No such file or directory in /www/forogolftoday.com.ar/htdocs/wiki/extensions/FCKeditor/FCKeditor.php on line 29

Fatal error: main() [function.require]: Failed opening required '/www/MYSERVER/htdocs/wiki/includes/ParserOptions.php' (include_path='/www/MYSERVER/htdocs/wiki:/www/MYSERVER/htdocs/wiki/includes:/www/MYSERVER/htdocs/wiki/languages') in /www/MYSERVER/htdocs/wiki/extensions/FCKeditor/FCKeditor.php on line 29

I notice that includes/ParserOptions.php is not on MediaWiki version 1.6.10...

There is away to solve this problem ?

Thanks !