DWQA Style Integration DIVI

Hello,

I am using a DIVI child theme, where the page.php template define the left-area for content and the right-area for sidebar.

I want to use a fullwidth page without sidebar. I have done this: https://www.designwall.com/guide/dw-question-answer-plugin/style-integration/ but it seems is still loading page.php template.

content-start-wrapper.php

<?php
get_header();
?>

<div id="main-content">
    <div class="container">
        <div id="content-area" class="clearfix">
            <div class="entry-content">

content-end-wrapper.php

            </div>
        </div>
    </div>
</div>

<?php get_footer(); ?>

I don’t know where is the problem, can you help me?

Thans!
Sergio.