Recaptcha The remote name could not be resolved: 'api-verify.recaptcha.net'

I am using rec.net ASP.net control with .net 2.0 and C #. I have a copied example packed into a .net demo.

In between, when submitting the recaptcha, I get the error “The remote name could not be resolved:“ api-verify.recaptcha.net. ”Everything works happily anyway.

I was sure that our firewall was not blocking it (this will open later!). Just wanted to check if anyone else experienced this / had any suggestions ?!