[help] auto login using curl

i have not worked much with curl...can someone tell me why this auto login script is not working:-

<?php
error_reporting (E_ALL | E_STRICT);
set_time_limit(0);


function curl_login($url,$data,$proxy,$proxystatus){
    $fp = fopen("cookie.txt", "w");
    fclose($fp);
    $login = curl_init();
    curl_setopt($login, CURLOPT_COOKIEJAR, "cookie.txt");
    curl_setopt($login, CURLOPT_COOKIEFILE, "cookie.txt");
    curl_setopt($login, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");
    curl_setopt($login, CURLOPT_TIMEOUT, 40);
    curl_setopt($login, CURLOPT_RETURNTRANSFER, TRUE);
    if ($proxystatus == 'on') {
        curl_setopt($login, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($login, CURLOPT_HTTPPROXYTUNNEL, TRUE);
        curl_setopt($login, CURLOPT_PROXY, $proxy);
    }
    curl_setopt($login, CURLOPT_URL, $url);
    curl_setopt($login, CURLOPT_HEADER, TRUE);
    curl_setopt($login, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
    curl_setopt($login, CURLOPT_FOLLOWLOCATION, TRUE);
    curl_setopt($login, CURLOPT_POST, TRUE);
    curl_setopt($login, CURLOPT_POSTFIELDS, $data);
    ob_start();      // prevent any output
    return curl_exec ($login); // execute the curl command
    ob_end_clean();  // stop preventing output
    curl_close ($login);
    unset($login);    
}                   

function curl_grab_page($site,$proxy,$proxystatus){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    if ($proxystatus == 'on') {
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, TRUE);
        curl_setopt($ch, CURLOPT_PROXY, $proxy);
    }
    curl_setopt($ch, CURLOPT_COOKIEFILE, "cookie.txt");
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");
    curl_setopt($ch, CURLOPT_URL, $site);
    ob_start();      // prevent any output
    return curl_exec ($ch); // execute the curl command
    ob_end_clean();  // stop preventing output
    curl_close ($ch);
} 

curl_login('
http://www.profilepic.com/','getusername=ankit_frenz&getpassword=testistest','','off');
echo curl_grab_page('http://www.profilepic.com/page/account','','off');
?> 

Code (markup):

thx

 

everything is correct except you need to print result of curl_exec of function curl_login

 

but i donot want to echo the result...i just want to grab the profile page after being logged in..
still i tried to modify the code as suggested by you...but no success

echo curl_login('
http://www.profilepic.com/','getusername=ankit_frenz&getpassword=testistest','','off');

Code (markup):

 

I guess this site does allow auto login