How to put FCK editor ?

Hi,
I want to put fckeditor in module>xyz, which i want it to able to controlled by admin., with all other attributes like, sort_order, status, and wants it to display like information module.,but i am not getting fckeditor , i tried for too times but it shows below errors: in text area .

<br />
<b>Notice</b>: Undefined variable: language in <b>C:\wamp\www\opc\admin\view\template\module\lefteditor.tpl</b> on line <b>30</b><br />
<br />

<b>Notice</b>: Undefined variable: lefteditor_welcome_ in <b>C:\wamp\www\opc\admin\view\template\module\lefteditor.tpl</b> on line <b>30</b><br />

Please suggest some methods for putting fckeditor, in modules section.

Thank you, danial