Pretty Photo and Contact Form 7

Dear All,

I am working on a wordpress website with Contact Form 7 plugin. When someone click on a button(trigger), contact form 7 open in prettyPhoto popup box. Upon click on submit button, popup close automatically. If there are some errors on form submission, sender cannot see the errors, because popup box automatically closed due to page refresh.

Is there any way to stop closing the popup box or stop page refresh and popup box remain open after submission of form so user can see the form response/errors?

I have applied code

<a href="#popup-contact-form-1" class="btn btn-primary" data-rel="prettyPhoto">Contact Us</a>
<div style="display:none; width: 500px; height: 500px; padding: 50px;" id="popup-contact-form-1">
  <div style="padding: 50px;  line-height: 1em;">
       [contact-form-7 id="2312" title="Contact form 1"]
  </div>
</div>

Can please you guide me the exact way.
Please resolve it.
Thanks in advance.

https://www.ads-software.com/plugins/prettyphoto/