How to delete div id="after_section_1" (white space between color sections)

Hi,

I am having trouble with a page where an additional white space appears between two color sections. I have never added it and I do not have access to html mode to delete it…
When I inspect the page with Firebug, it identifies the white space as:
<div id=”after_section_1″ class=”main_color av_default_container_wrap container_wrap fullsize”><div class=”container”><div class=”template-page content av-content-full alpha units”><div class=”post-entry post-entry-type-page post-entry-46″><div class=”entry-content-wrapper clearfix”></div></div></div><!– close content main div –></div></div>

How do I get rid of this and why did it happen?

Thanks for your help,

Fiorilla