Failure Sending Message in Asp.net 3.5

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C#3.0

VS2008

C#

Windows

, +

Hi All,
I am facing problem in sending mail functionality in window 7.
I am using vs2008,c# and asp.net 3.5.

I am using following code for sending mail..........

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Net;
using System.Net.Mail;
using System.Text;

public static void SendMail(string from, string to, string subject, string body)
    {
        MailMessage mailMessage = new MailMessage();
        mailMessage.From = new MailAddress(from);
        mailMessage.To.Add(to);
        mailMessage.Subject = subject;
        mailMessage.IsBodyHtml = true;
        mailMessage.BodyEncoding = Encoding.UTF8;
        mailMessage.Body = body;
        mailMessage.Priority = MailPriority.Normal;

        // Smtp configuration for localhost / gmail 
        SmtpClient client = new SmtpClient();
        client.Credentials = new NetworkCredential("[DELETED]@gmail.com", "mukeshpa"); // enter your user name and password for gmail 
        client.Port = 587; //use 465 or 587 ports for gmail     //use 25          
        client.Host = "smtp.gmail.com";// for gmail            //use "127.0.0.1";
        client.EnableSsl = false; // true for gmail 

        MailMessage message = mailMessage;

        try
        {
            client.Send(message);
            Show("sending mail........");

        }
        catch (Exception ex)
        {
            Show("Sending fail.." + ex.ToString());
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        SendMail(txtFrom.Text, txtTo.Text, txtSubject.Text, txtBody.Text);
    }

please help or any suggestion for me.......
help will be greatly appreciated..........

thanks
mukesh

[edit]Never post your email address in any forum, unless you really like spam! If anyone replies to you, you will receive an email to let you know - OriginalGriff[/edit]