Проверка орфографии не работает в CKEditor

Проверка орфографии не работает в моем CKEditor. Я пробовал disableNativeSpellChecker = false, но тщетно. Вот мой config.js. Моя версия CKEditor 4.5.6 Любая идея?

CKEDITOR.editorConfig = function( config ) {
// Define changes to default configuration here.
// For complete reference see:
// http://docs.ckeditor.com/#!/api/CKEDITOR.config
config.disableNativeSpellChecker = true;
// The toolbar groups arrangement, optimized for two toolbar rows.
config.toolbarGroups = [
    { name: 'clipboard',   groups: [ 'clipboard', 'undo' ] },
    { name: 'editing',     groups: [ 'find', 'selection'] },
    { name: 'links' },
    { name: 'insert' },
    { name: 'forms' },
    { name: 'tools' },
    { name: 'document',    groups: [ 'mode', 'document', 'doctools' ] },
    { name: 'others' },
    { name: 'basicstyles', groups: [ 'basicstyles', 'cleanup' ] },
    { name: 'paragraph',   groups: [ 'list', 'indent', 'blocks', 'align', 'bidi' ] },
    { name: 'styles' },
    { name: 'colors' },
    { name: 'about' }
];

// Use line below for line break in toolbar
//      '/',

// Html encode ouput
config.htmlEncodeOutput = true;

config.removePlugins = 'elementspath,maximize,scayt';

// Remove some buttons provided by the standard plugins, which are
// not needed in the Standard(s) toolbar.
config.removeButtons = 'Strike,Subscript,Superscript,Source,About,Styles,Blockquote,Link,Unlink,Anchor,Image,Table,HorizontalRule,SpecialChar';

// Set the most common block elements.
config.format_tags = 'p;h1;h2;h3;pre';

// Simplify the dialog windows.
config.removeDialogTabs = 'image:advanced;link:advanced';
};