smtp-php-mailer没有响应

我有wamp server2，但我安装了phpmailer5，它会引起任何问题吗？我的php.ini我用过这个网站

这是代码：

<?php
require_once('./PHPMailer_v5.1/class.phpmailer.php');
define('GUSER','phpmailer23@gmail.com'); // GMail username
define('GPWD','mypass'); // GMail password
function smtpmailer($to, $from, $from_name, $subject, $body) {
        global $error;
        $mail = new PHPMailer();  // create a new object
        $mail->IsSMTP(); // enable SMTP
        $mail->SMTPDebug = 0;  // debugging: 1 = errors and messages, 2 = messages only
        $mail->SMTPAuth = true;  // authentication enabled
        $mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for GMail
        $mail->Host = 'smtp.gmail.com';
        $mail->Port = 25;
        $mail->Username = GUSER;
        $mail->Password = GPWD;
        $mail->SetFrom($from, $from_name);
        $mail->Subject = $subject;
        $mail->Body = $body;
        $mail->AddAddress($to);
        if(!$mail->Send()) {
                $error = 'Mail error: '.$mail->ErrorInfo;
                return false;
        } else {
                $error = 'Message sent!';
                return true;
        }
}
smtpmailer('nickparsa@gmail.com','phpmailer23@gmail.com', 'phpmailer', 'test mail message', 'Hello World!');
if (smtpmailer('nickparsa@gmail.com','phpmailer23@gmail.com', 'phpmailer', 'test mail message', 'Hello World!')) {
    echo "sent";
}
if (!empty($error)) echo $error;
?>

这是输出：

SMTP Error: Could not connect to SMTP host. SMTP Error: Could not authenticate. Mail error: SMTP Error: Could not authenticate.

然后我转到php.ini并将smtpserver设置为smtp.google.com

SMTP = smtp.google.com

再次无变化