Mailpress form into Easy Fancybox PopUp

[asis rodriguez]

Hello to all.
I use contact form with this code and works perfectly since years:

<div style="background-color: #FFCC99; padding: 10px">
<a href="#contact_form_pop" class="fancybox-inline">Utilice nuestro SERVICIO AL LECTOR</a>
<div style="display:none" class="fancybox-hidden">
<div id="contact_form_pop">
[contact-form-7 id="57" title="Servicio al Lector"]
</div>
</div>
</div>

but now, need to use Mailpress form and, if I use the same code but with mailpress variations like this:

<div style="background-color: #FFCC99; padding: 10px">
<a href="#contact_form_pop" class="fancybox-inline">Utilice nuestro SERVICIO AL LECTOR</a>
<div style="display:none" class="fancybox-hidden">
<div id="contact_form_pop">
[mailpress_form id=’6’]</div>
</div>
</div>

when send the form, the web colapse until a 504 `page appear. So, I understand the code

<div id=”contact_form_pop”>

must be wrong for Mailpress form.

please, do you know what I have to put to work? if a put

<div id=”mailpress_form_pop”>

the popup even not appear.

I create a post in https://www.seguridadprofesionalhoy.com/pruebas-servicio-al-lector/ to show this. Firts the Mailpress form which works perfectly and second tha actual with contact form.

thanks in advanced to who can give some ideas to solve.

asis