I’ve updated to 2.0.2 to make it work on live site.
Actually now I think it’s not a BPW reCaptcha bug, but some problem with curl and ssl on my local server/php.
For now I’ve just removed ssl check in curlpost.php
btw, the problem is that curl return
SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed