CURL for WAMP
There seems to be a bug somewhere. If you are experiencing this on Windows 7 64 bit then try installing Apache addon version 2.2.9 and PHP addon version 5.3.1 and switching to those in WAMP and then activating the CURL extension. That worked for me.
You can download it from http://www.wampserver.com/en/.
Add a similar issue.Fixed once I upgraded to the latest version of Wampserver 64x here http://www.wampserver.com/