Use of undefined constant CURLOPT_IPRESOLVE – assumed 'CURLOPT_IPRESOLVE'-Collection of common programming errors

i have http://www.idiotminds.com/login-with-facebook-in-codeigniter/ but i have error

> A PHP Error was encountered
> 
> Severity: Notice
> 
> Message: Use of undefined constant CURLOPT_IPRESOLVE - assumed
> 'CURLOPT_IPRESOLVE'
> 
> Filename: facebook/base_facebook.php

and i fix CURLOPT_SSL_VERIFYPEER => false, but not fixed

but i have enable the php_curl

**

cURL support enabled
cURL Information libcurl/7.24.0 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5

**

code

public static $CURL_OPTS = array(
    CURLOPT_CONNECTTIMEOUT => 10,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT        => 60,
    CURLOPT_USERAGENT      => 'facebook-php-3.2',
    CURLOPT_SSL_VERIFYPEER => false
  );

it still not work help me please BIG THANKS