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First, thanks for the code! Second, if using this with GoDaddy, you will need to specify the use of an SSL Proxy.

GoDaddy shows the proxy info here:
http://help.godaddy.com/article.php?article_id=288&topic_id

You can paste the following right after the curl_init(); in the class (about line 57)

//required for GoDaddy
curl_setopt ($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
curl_setopt ($ch, CURLOPT_PROXY,"http://proxy.shr.secureserver.net:3128");
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt ($ch, CURLOPT_TIMEOUT, 120);
//required for GoDaddy