error to connect soap server in php

i am working on shopping cart project, i need globalpay integration . i got the sample code and run in my localhost it shows me error this.

Warning: SoapClient::__construct() [function.SoapClient---construct]: SSL: fatal protocol error in C:\wamp\www\exampls\PHP Web Ser开发者_如何转开发vice Sample (Credit Card) 4.0.0\PHP Web Service Sample (Credit Card) 4.0.0\globalpay.inc.php on line 37

i enabled soap server in php.ini.

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My guess is that you need to install the OpenSSL extension for PHP.