Hi, I am trying to push some data to the salesforce from my web site. Here is the testing code. However, when it runs, there is an error occured with the LOGIN line: "INVALID_LOGIN: Invalid username or password or locked out."

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<?php

    $USERNAME = "ABC@gmail.com";
    $PASSWORD = "password";

   
    define("SOAP_CLIENT_BASEDIR", "register-plus/salesforce_php");

    require_once (SOAP_CLIENT_BASEDIR.'/SforceEnterpriseClient.php');
    require_once (SOAP_CLIENT_BASEDIR.'/SforceHeaderOptions.php');
    require_once (SOAP_CLIENT_BASEDIR.'/userAuth.php');


    try {
        $mySforceConnection = new SforceEnterpriseClient();
        $mySoapClient =      $mySforceConnection->createConnection(SOAP_CLIENT_BASEDIR.'/enterprise.wsdl.xml');
   
        $mylogin = $mySforceConnection->login($USERNAME, $PASSWORD);
       
        $sObject = new stdclass();
        $sObject->FirstName = 'Smith';
        $sObject->LastName = 'John';
        $sObject->Phone = '510-555-5555';

        $createResponse = $mySforceConnection->create(array($sObject), 'Leads');

        $ids = array();
        foreach ($createResponse as $createResult) {
            print_r($createResult);
            array_push($ids, $createResult->id);
        }

        } catch (Exception $e) {
            echo $mySforceConnection->getLastRequest();
            echo $e->faultstring;
    }
?>