Adding via GreaseMonkey

I use a site that currently makes use of a text area and suggests using a html editor to create code and then paste it into the box I am attempting to add CKE via greasemonkey.

when I use the grease monkey script

// ==/UserScript==

var edt = document.createElement('script'); 
edt.src = 'http://ebonverity.com/ckeditor/ckeditor.js';
edt.type = 'text/javascript'; 
document.getElementsByTagName('head')[0].appendChild(edt); 
CKEDITOR.replace( 'cont' );

it does nothing

and when I use

// @require http://ebonverity.com/ckeditor/ckeditor.js

// ==/UserScript==

var edt = document.createElement('script'); 
edt.src = 'http://ebonverity.com/ckeditor/ckeditor.js';
edt.type = 'text/javascript'; 
document.getElementsByTagName('head')[0].appendChild(edt); 
CKEDITOR.replace( 'cont' );

it removes the text box all together

but if I use the one with the require then load the page the remove the require and load the page it works just fine... for one load

any suggestions