Problem with Zend reCAPTCHA with DW CS5 Ch 8 D Powers PHP book

Hi,

I am following David Powers' book and I am up to Chapter 8, trying to use the reCaptcha utility on a form.

When I click submit I get the following error, which is handled:

"Unable to Connect to tcp://api-verify.recaptcha.net:80. Error #12: Cannot allocate memory"

I have tried to use the google recaptchalib.php, but this dies at @fsockopen($host, $port, $errno, $errstr, 10) in function _recaptcha_http_post.

This happens in Live View and when using Safari.

Please can anyone give me some direction. I'm on Macbook Pro, Adobe CS5, MAMP Pro using Port 80, etc.

Thanks, Mike