FCK Editor Link to Node button error

I have recently uncommented some lines on my fckeditor.config.js file so I can use the ['Link','Unlink','LinkToNode','LinkToMenu','Anchor'] . I have also uncommented the Plugin code at the top of the file: FCKConfig.Plugins.Add( 'linktonode', 'en,pl' ) ; FCKConfig.Plugins.Add( 'linktomenu', 'en,pl' ) ; but everytime I try to use these buttons in the FCKeditor I get this big Windows IE pop up error saying:

Error: error
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"

head
meta http-equiv="Content-Type" content="text/html; charset=utf-8" /
title>Humor | the-indian-subcontinent.org meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /
meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
link rel="shortcut icon" href="/misc/favicon.ico" type="image/x-icon" /
link type="text/css" rel="stylesheet" media="all" href="/modules/aggregator/aggregator.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/book/book.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/cck/theme/content-module.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/fckeditor/fckeditor.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/filefield/filefield.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/node/node.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/system/admin.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/system/defaults.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/system/system.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/system/system-menus.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/user/user.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/modules/cck/modules/fieldgroup/fieldgroup.css?l" /
link type="text/css" rel="stylesheet" media="all" href="/themes/paradise/style.css?l" /
script type="text/javascript" src="/misc/jquery.js?l">

script type="text/javascript" src="/misc/jquery.form.js?l">

!--//-->![CDATA[//>!--
jQuery.extend(Drupal.settings, { "basePath": "/"}...

And all I can do is push the OK button.

Does anyone know why these buttons do not work? Do I have to install a specific module to get the LinkToNode buttons working?

I had to remove the angle brackets from the above code to get it to appear.