[Undefined Call Function Curl_Init() In Php Unit]

I have installed selenium server standalone 2.30.0, wamp server 2.0i, php 5.3.0, phpunit 3.6.12

While i try to execute a Example php file from the PHP Unit, i get the error as "Fatal Error: Call to undefined function curl_init() in C:\wamp\bin\php\php5.3.0\PEAR\PHPUnit\Extensions\SeleniumTestCase\Driver.php on line 987"

I had checked the php.ini and ensure that removing ';' semicolon in extension=php_curl.dll
restart the wamp server, ensured the libeay32.dll and ssleay32.dll files are in System32

Please suggest me regarding this issue....

The code below is Example.php

<?php
include_once("PEAR/PHPUnit/Extensions/SeleniumTestCase/Driver.php");
include_once("PEAR/PHPUnit/Extensions/SeleniumTestCase.php");
class Example extends PHPUnit_Extensions_SeleniumTestCase
{
    protected $captureScreenshotOnFailure = True;
    protected $screenshotPath = '/var/www/localhost/htdocs/screenshots';
    protected $screenshotUrl = 'http://localhost/screenshots';

protected function setUp()
{
$this->setBrowser("*firefox");
$this->setBrowserUrl("http://www.google.co.in");
}

public function testTitle()
    {
        $this->open('http://www.google.co.in');
        $this->assertTitle('Google WWW Page');
    }

}
?>