Form keeps loading

Hi there,

I have got a problem which i cannot solve.

I use layerslider WP which comes with the theme.
However, when i add a form, layerslider keeps loading. This form is of real essence to us, so could you guys please have a look at this problem?

You can find the slider here: http://www.netwerkhoreca.nl
In the source code you will find this piece:

<form class=”moonray-form-clearfix” action=”https://forms.moon-ray.com/v2.4/form_processor.php?&#8221; method=”post” accept-charset=”UTF-8″ >
<div class=”moonray-form-element-wrapper moonray-form-element-wrapper-alignment-left moonray-form-input-type-text”><input name=”firstname” class=”mdpinput” type=”text” id=”mr-field-element-388095748240″ required value=”” placeholder=”Llena tu nombre aquí…..”/></div>
<div class=”moonray-form-element-wrapper moonray-form-element-wrapper-alignment-left moonray-form-input-type-text”><input name=”email” class=”mdpinput” type=”text” id=”mr-field-element-506255636839″ required value=”” placeholder=”Llena tu email aquí…..”/></div>
<div class=”moonray-form-element-wrapper moonray-form-element-wrapper-alignment-center moonray-form-input-type-submit”><input type=”submit” name=”submit-button” value=”Acceso gratuito inmediato” class=”mdpsubmit” id=”mr-field-element-28403787408″ data-lastDisplayVal=”http://www1.moon-ray.com/pub_designer_files/images/1334032139.png&#8221; src/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”afft_” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”aff_” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”sess_” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”ref_” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”own_” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”oprid” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”contact_id” type=”hidden” value=””/></div>
<div class=”moonray-form-element-wrapper moonray-form-input-type-hidden”><input name=”uid” type=”hidden” value=”p2c9239f23″/></div>
</form>

The piece of code above causes the problem.

To be more precise, when i strip it down it seems that this line is causing the problem:
<div class=”moonray-form-element-wrapper moonray-form-element-wrapper-alignment-center moonray-form-input-type-submit”><input type=”submit” name=”submit-button” value=”Acceso gratuito inmediato” class=”mdpsubmit” id=”mr-field-element-28403787408″ data-lastDisplayVal=”http://www1.moon-ray.com/pub_designer_files/images/1334032139.png&#8221; src/></div>

If i only add this line the problem is also there.

Could you guys please help?