PHPMailer中的多个图像附件

我使用的是PHPMailer类，它不支持多张图片上传

$mailer = new phpmailer();
$mailer->IsMail();
$mailer->Subject = 'NewsLetter Request';            
$mailer->AddAddress('myemailid', 'Name');
$mailer->message_type =  "attachments";
$mailer->AddAttachment($_FILES["logo"]["tmp_name"],$_FILES["logo"]["name"]);
$mailer->AddAttachment($_FILES["logo2"]["tmp_name"],$_FILES["logo2"]["name"]);
$mailer->Body = $htmlBody;
$mailer->isHTML(true);

如果我发送的邮件我得到最后附加的图像是$_FILES['logo2']，我没有得到第一个图像在邮件中