i can't add plugin in my ra-wysiwyg-editor

Question

I need to plugin pbckcode

this is line:

http://ckeditor.com/addon/pbckcode

iam add this code in my file config.js

config.toolbarGroups = [

        { name: 'document', groups: [ 'mode'] }, // shows the source button

        { name: 'pbckcode' } ,                   // shows the pbckcode button

    ];

    config.extraPlugins = 'pbckcode';

 

and name plugin pbckcode in file ra-wysiwyg

 

"['RemoveFormat', 'pbckcode', 'Maximize']".

 

The icon has been added to the wysiwyg-editor, but it does not work