K2 reCAPTCHA "Could not open socket" error

[Az Mandius]

Hello,
I am on Joomla K2 v2.6.8.
- Other ReCaptcha plugins are disabled (Captcha - ReCaptcha, Captcha - Joo ReCaptcha).
- Site Settings Default Captcha = None
- User Manager Options Captcha = None
Enable reCaptcha on registration form = enabled, yet when i try to register (www.principiuldivin.md/component/users/?view=registration) i get "Could not open socket" error.
Replaced
if (($fs = @fsockopen($host, $port, $errno, $errstr, 10)
with
if (($fs = @fsockopen(gethostbyname($host), $port, $errno, $errstr, 10)
in /administrator/components/com_k2/lib/recaptchalib.php
Didn't help much, now registration is forever stuck at trying to submit form.

Please help.
Thank you.