Boxzilla form not submitting

I’m working on a client website and the pop-up I created with MC4WP/Boxzilla is not functioning properly. It looks and appears like I want (slides in after 6 seconds) and I can fill out the fields, but clicking “Subscribe” does nothing and does not send the info to MC. I can close the box just fine though by clicking X or outside the box. This is the code I’m using:

<h4 style=”text-align: center;”>Want more PawsGo content and news? Subscribe to our email list!</h4>
<p style=”text-align: center;”><label>First Name:</label>
<input name=”FNAME” type=”text” placeholder=”Your name” /></p>
<p style=”text-align: center;”><label>Email address:
<input name=”EMAIL” required=”” type=”email” placeholder=”Your email address” /></label></p>
<p style=”text-align: center;”>(We won’t spam you, we promise!)
<label><input name=”mc4wp-subscribe” type=”checkbox” value=”1″ />Okay, thanks!</label></p>
<p style=”text-align: center;”><input type=”submit” value=”Subscribe” /></p>

I used the standard code created for the form and added the “custom integration” code which is where the checkbox comes in. I set up the API key and it says connected, so I’m not sure what’s happening. Thanks for your help!

The page I need help with: [log in to see the link]