HTML body email sending

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C#3.0

C#

Hello everyone,
I am facing a problem.
When I run the code to send email on my machine it works well. It sends mail in HTML Format, but when I put the exe on server it didn't sends in HTML format.
In the mail I get all the HTML tags.

I did the code is:

MailMessage message = new MailMessage();
            SmtpClient client = new SmtpClient();
            try
            {
                message.From = new MailAddress(fromemail, fromname);
                message.Subject = subject;
                //message.Body = body;
                //message.IsBodyHtml = true;
                message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(body, null, "text/html")); 
                message.To.Add(new MailAddress(to));
                if (cc != "")
                {
                    foreach (string str in cc.Split(new char[] { ',' }))
                    {
                        message.CC.Add(new MailAddress(str.Trim()));
                    }
                }
                if (bcc != "")
                {
                    foreach (string str2 in bcc.Split(new char[] { ',' }))
                    {
                        message.Bcc.Add(new MailAddress(str2.Trim()));
                    }
                }
                client.Host = server;
                client.EnableSsl = true;
                NetworkCredential credential = new NetworkCredential
                {
                    UserName = new MailAddress(fromemail, fromname).Address,
                    Password = frompwd
                };
                client.UseDefaultCredentials = true;
                client.Credentials = credential;
                client.Port = 0x24b;
                client.Send(message);