reCaptcha in xForms shows in HTML but doesn't render


Hi, I've got a site running EpiServer 7.19 with ASP.Net 4.5 web forms. We are using an xForms form builder and would like to add a captcha to these forms. We used this guide and have successfully added the html to the page, which appears like so:

There are no console errors and no indication at all of the captcha's existence, except its html (which contains no css that would hide it). Anyone have an idea why that would be?

Edited, Jun 21, 2016 22:14
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