Modal Stack and Subscribe Button Issue

Hello,
I just bought the Modal Stack by Yuzool and am having issues getting the SUBSCRIBE button to work. I’m using Foundry theme and MailChimp, which I copied the following code from and embedded as HTML on the Modal stack. Here’s the site where the NEWSLETTER button is located: http://metrospeechlanguagenetwork.org

#mc_embed_signup{background:#fff; clear:left; font:14px Helvetica,Arial,sans-serif; width:800px;} /* Add your own Mailchimp form style overrides in your site stylesheet or in this style block. We recommend moving this block and the preceding CSS link to the HEAD of your HTML file. */
<div id="mc_embed_signup_scroll">

Subscribe

* indicates required

Email Address *

First Name

Last Name

<div style="position: absolute; left: -5000px;" aria-hidden="true"><input type="text" name="b_2be85436fc7ceacf1e36f4a2f_dd495cf964" tabindex="-1" value=""></div>

<div class="clear"><input type="submit" value="Subscribe" name="subscribe" id="mc-embedded-subscribe" class="button"></div>

</div>

We’ve been working with Mr. Solomon on this in looking at the modal stack, but as far as we can tell, it seems the browsers (tested on Chrome, Safari, Firefox, Opera) are not recognizing/invoking the mail function for some reason. Javascript though is running and when we do an inspect element, there is no error message.