I am not getting my updated email from gmail

[shanishkr11]

My code is following
int noofemailshow = 0;
if (txtnoofemail.Text.Trim() != "")
noofemailshow = Convert.ToInt32(txtnoofemail.Text.Trim());
else
noofemailshow = 25;

    if (rememberme.Checked == true)
    {
        Response.Cookies["userid"].Value = txtEmailId.Text.Trim();
        Response.Cookies["pwd"].Value = txtPassword.Text.Trim();
        Response.Cookies["userid"].Expires = DateTime.Now.AddDays(15);
        Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(15);
    }

    noofemailforfetch = noofemailshow;
    emailId  =txtEmailId.Text.Trim();
    Password = txtPassword.Text.Trim();

    Pop3Client pop3Client;
    pop3Client = new Pop3Client();
    pop3Client.Connect("pop.gmail.com", 995, true);
    pop3Client.Authenticate(txtEmailId.Text.Trim(), txtPassword.Text.Trim(), AuthenticationMethod.UsernameAndPassword);

    dt = new DataTable("Inbox");
    dt.Columns.Add("counteremail", typeof(string));
    dt.Columns.Add("linkforcont", typeof(string));
    dt.Columns.Add("Sender", typeof(string));
    dt.Columns.Add("Emails", typeof(string));
    dt.Columns.Add("Subject", typeof(string));
    dt.Columns.Add("Date", typeof(DateTime));
    dt.Columns.Add("Reply", typeof(string));
    dt.Columns.Add("Replyall", typeof(string));
    dt.Columns.Add("Forward", typeof(string));

    int count = pop3Client.GetMessageCount();
    int counter = 0;

    int noofemail = 0;
    int noofemailtoday = 0;

    for (counter = count; counter >= count - noofemailshow; counter--)
    {
        Message message = pop3Client.GetMessage(counter);

        noofemail++;
        string Reply = "";
        string ReplyAll = "";
        string linforcontact = "";

        string Forward = "";
        string Subject = "";
        string strimsub = "";
        strimsub = getsortstring(message.Headers.Subject);

        Reply = string.Format("<a href='#stack2' class='btn' style='color:white' data-toggle='modal'><input type='button' class='btncontact' value='{0}' /></a>", "Reply", message.Headers.From.MailAddress);
        ReplyAll = string.Format("<a href = 'mailto:{1},{2}' class='btn' style='color:white'>{0}</a>", "Reply to All", message.Headers.From.MailAddress, message.Headers.Cc);
        Forward = string.Format("<a href = 'mailto:{1}' class='btn' style='color:white'>{0}</a>", "Forward", "");
        if (message.Headers.DateSent.ToString("MM/dd/yyyy") != DateTime.Now.ToString("MM/dd/yyyy"))
            Subject = string.Format("<span style='color:#000000;font-weight:bold' class='checkreademail'>{0}</span><span style='float:right;color:#000000;' class='checkreademail''>{1}</span><br><span style='color:#999999'>{2}</span>", message.Headers.From.DisplayName, message.Headers.DateSent.ToShortDateString(), strimsub);
        else
        {
            Subject = string.Format("<span style='color:#000000;font-weight:bold' class='checkreademail''>{0}</span><span style='float:right;color:#000000;' class='checkreademail''>{1}</span><br><span style='color:#999999'>{2}</span>", message.Headers.From.DisplayName, message.Headers.DateSent.ToLongTimeString(), strimsub);
            noofemailtoday++;
        }
        linforcontact = checkcontact(message.Headers.From.Address);
        dt.Rows.Add(new object[] { counter, linforcontact, message.Headers.Sender, message.Headers.From.MailAddress, Subject, message.Headers.DateSent.ToLongDateString() + " " + message.Headers.DateSent.ToLongTimeString(), Reply, ReplyAll, Forward });

    }
    noofmailtoday.InnerText = noofemailtoday.ToString();

    EnumerableRowCollection<DataRow> rows = null;
    //rows = (from row in dt.AsEnumerable()
    //        where row.Field<DateTime>("Date") > DateTime.Now.AddDays(-30)
    //        orderby row["Date"] descending
    //        select row);
    //dt = rows.AsDataView().ToTable();
    gvEmail.DataSource = dt;
    gvEmail.DataBind();
    gvEmail.Columns[0].HeaderText = "Inbox";
    ViewState["Paging"] = dt;