[Plugin: WordSocial] cant activate plugin

when i a ctivate the plugin it says this:

Fatal error: Uncaught exception ‘Exception’ with message ‘Facebook needs the CURL PHP extension.’ in C:\xampp\htdocs\wordpress\wp-content\plugins\wordsocial\inc\facebook\base_facebook.php:19 Stack trace: #0 C:\xampp\htdocs\wordpress\wp-content\plugins\wordsocial\inc\facebook\facebook.php(18): require_once() #1 C:\xampp\htdocs\wordpress\wp-content\plugins\wordsocial\wso_config.php(28): require_once(‘C:\xampp\htdocs…’) #2 C:\xampp\htdocs\wordpress\wp-content\plugins\wordsocial\wordsocial.php(28): require_once(‘C:\xampp\htdocs…’) #3 C:\xampp\htdocs\wordpress\wp-admin\plugins.php(146): include(‘C:\xampp\htdocs…’) #4 C:\xampp\htdocs\wordpress\wp-admin\plugins.php(148): plugin_sandbox_scrape(‘wordsocial/word…’) #5 {main} thrown in C:\xampp\htdocs\wordpress\wp-content\plugins\wordsocial\inc\facebook\base_facebook.php on line 19

http://wordpress.org/extend/plugins/wordsocial/