PHP cURL session issues with login

<?php

function login($purl, $pData = "") {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $purl); //login URL
    curl_setopt($ch, CURLOPT_POST, 1);
    $postData = 'login=login&login%3Ausername=XXXXXXXX&login%3Apassword=XXXX&login%3Aloginimg.x=53&login%3Aloginimg.y=9&javax.faces.ViewState=j_id1';
    /*$postData='
      login:username=brad
      &login:password=xxxxx
      &txthdbtn=Login
      &imageField.x=27
      &imageField.y=8';
     */
    curl_setopt($ch, CURLOPT_POSTFIELDS, $pData);
    curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $store = curl_exec($ch);
    if(!$store) {
        echo 'error occurred';
    }
    echo "_______________<br />";
    print_r($store);
    echo "_______________<br />";
    return $ch;
}


function downloadUrl($Url, $ch) {
    curl_setopt($ch, CURLOPT_URL, $Url);
    curl_setopt($ch, CURLOPT_POST, 0);
    curl_setopt($ch, CURLOPT_REFERER, 'http://www.google.com/"');
    curl_setopt($ch, CURLOPT_USERAGENT, "MozillaXYZ/1.0");
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    $output = curl_exec($ch);
    return $output;
}
$uuu = "https://www.beconsumables.com/cm/UserShunt2.cfm?action=logon";
$login_url = "https://www.aviall.com/aviall/login-iframe.seam";
$ref = "http://www.beconsumables.com/cm/support/support.cfm";
$postv = "POSTDATA=username=XXXXX&upasswd=XXXXXX&Submit+Request=%3C%3C+Log+In+%3E%3E";
$zerosch = "http://www.zerosch.com/";




//$session = login($uuu, $postv);
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $zerosch); //login URL
    //curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $store = curl_exec($ch);
    if(!$store) {
        echo 'error occurred';
    }


$first_url = "https://www.aviall.com/aviall/searchPart.ftl?searchTerm=HL20PB5-3&cid=99777011756";
//$ret = downloadUrl($first_url, $session);
echo "XXXXXXXXXXX<br />";
//print_r($ret);
echo "XXXXXXXXXXX<br />";


?>