"The reCAPTCHA was invalid. Go back and try it again."

[Mark Harris]

On my site I recently changed from reCAPTCHA 1.0 to reCAPTCHA 2.0 (built in to GravityForms, a Wordpress plugin).

I'm getting the error The reCAPTCHA was invalid. Go back and try it again.

How can I diagnose the cause of this? I think it may be a server security issue -- with 1.0 I was getting an error ("failed to open socket") that pointed to the fact that my host has fsockopen disabled.  I think reCAPTCHA 1.0 uses fsockopen to call back to the server to verify API keys.

How can I verify if this same problem is occurring with 2.0? 

Thanks!

Mark

[Josee Lefebvre]