Send mail with SmtpClient via smtp.live.com

Question

Hi everyone,
first thanks in advance for any help.
Here is my problem:
I can't get any email from my code:

                MailMessage mailMessage = new MailMessage();
                mailMessage.From = new MailAddress("[email protected]", "Bernard Lessard");
                mailMessage.To.Add(new MailAddress("[email protected]"));
                mailMessage.Subject = "Your BabyfootClub username and password.";
                mailMessage.Body = "Your username is: " + sUsername + "\r\n";
                mailMessage.Body += "Your password is: " + sPasswrod + "\r\n";

                SmtpClient smtpClient = new SmtpClient("smtp.live.com", 587);
                smtpClient.EnableSsl = true;
                smtpClient.UseDefaultCredentials = false;
                smtpClient.Credentials = new System.Net.NetworkCredential("[email protected]", "mypassword");
                smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
            
                smtpClient.Send(mailMessage);

Am I missing something?
A config in the Web.config maybe?
I'm actually inside a WCF service.

Thanks