You have not supplied enough information about your setup for me to answer that question. I do not run WAMP server, so I have no idea where it wants the extensions. I install and configure PHP, Apache, etc and configure it myself instead of relying on third parties to push them together and configure them the way they think is best. You would need to consult your php.ini to find out what folder is used for extensions, and make sure that the extension is located inside said folder. Failing that you would want to consult with the publishers of WAMP server for further support.