My Form keeps loading and doesnt send the email

Hello, I´m having some issues with the contact form.
I´m using the sendemail.php in this website http://danielamastrandrea.com/test/contacto.html
The problem is that when I send the form, keeps loading and does´t sends the email.

$mail->IsSMTP();
$mail->Host = "smtp.gmail.com";
$mail->SMTPDebug = 0;
$mail->SMTPAuth = true;
$mail->Port = 26;
$mail->Username = "agustina.neglia@gmail.com";
$mail->Password = "****";

I added this code as is recommended in the documentation.
Any idea how to fix it?
Thanks!