I sometimes have trouble with reCaptha doing that. I click on it and it just spins and spins and spins. Usually it will either finally either give me a green check mark, load an image test or give me an unable to connect but once in a while it will just spin and spin and spin, like it's hung. Usually I can fix it by just click the create link button which causes an wrong captha error and reloads the the recaptha box. Clicking on this new box usually completes easily. A couble of times I have pages this did work on, nothing worked except to close that tab and reload the entire page in a new tab.