Getting error when using inline editing

Hey guys,

I have an error while using inline editing. I'm using CKEditor 4.1.2. I try to enable editing with explicit code and got error message like this :

Uncaught TypeError: Cannot call method 'getEditor' of undefined

My html code :

<div class="sb-template-item" id="mod_text_4" contenteditable="true">
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Fusce euismod commodo ante. Suspendisse potenti. Nunc pellentesque quam vel pede.
</div>

My JS code :

<script>
    CKEDITOR.disableAutoInline = true;
    CKEDITOR.inline('mod_text_4');
</script>

Thanks for the answer.