Button not giving desired result
===

I have this Default.aspx.cs

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Data;
    using System.Xml;
    using System.IO;
    
    
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
    
            Calendar1.SelectedDate = DateTime.Today;
            info.Visible = false;
            meeting.Visible = true;
            member.Visible = true;
            label.Visible = true;
        }
    
        protected void Button3_Click(object sender, EventArgs e)
        {
            DateTime Now = DateTime.Today;
            DateTime wed1 = getFirstWednesdayOfMonth(Now);
            DateTime wed3 = getThirdWednesdayOfMonth(Now);
    
            if (Now < wed1)
            {
                Label5.Text = "The next meeting is on" + "\n" + wed1.ToShortDateString() + "\nat 7 pm in room S242";
            }
            else if (Now < wed3)
            {
                Label5.Text = "The next meeting is on" + "\n" + wed3.ToShortDateString() + "\nat 7 pm in room S242";
            }
        }
    
        protected DateTime getFirstWednesdayOfMonth(DateTime seedDate)
        {
            DateTime wed1 = new DateTime(seedDate.Year, seedDate.Month, 1);
            while (wed1.DayOfWeek != DayOfWeek.Wednesday)
            {
                wed1 = wed1.AddDays(1);
            }
            return wed1;
        }
        protected DateTime getThirdWednesdayOfMonth(DateTime seedDate)
        {
            DateTime wed3 = new DateTime(seedDate.Year, seedDate.Month, 15);
            while (wed3.DayOfWeek != DayOfWeek.Wednesday)
            {
                wed3 = wed3.AddDays(1);
            }
            return wed3;
        }
    
        protected void btnInfo_Click(object sender, EventArgs e)
        {
            btnInfo.Visible = false;
            info.Visible = true;
    
        }
    
        protected void Button2_Click(object sender, EventArgs e)
        {
            if (IsPostBack)
            {
                if (validateFirst.IsValid && validateLast.IsValid && validatePhone.IsValid && validateEmail.IsValid)
                {
                    lblThanks.Text = "Thanks! you will contacted in 2 business days!";
                    info.Visible = false;
                }
            }
        }
        protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (ListBox1.SelectedValue == "analyst")
            {
    
    
            }
        }
    }

**and Default.aspx**
  

    <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
    
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
        <title></title>
        <style type="text/css">
            .heading
            {
                text-align: center;
                border-style: double;
                background-color:#F2A988;
                font-family:Sans-Serif;
                font-weight:bold;
                          
            }
            #wrapper {
                margin: 0 auto;
                width: 400px; 
                text-align:left;
            }
            .style1
            {
                text-align: center;
                font-family:Sans-Serif;
            }
            .style2
            {
                font-family: Arial, Helvetica, sans-serif;
            }
        </style>
    </head>
    <body style="height: 642px; width: 911px; " id="wrapper">
        <form id="form1" runat="server">
        
        <div class="heading">
            ABC Computer Club - Inquiry Form</div>
            <br />
        
        <asp:Calendar ID="Calendar1" runat="server" Font-Names="Arial"></asp:Calendar>
        
       
        
            <br />
        <asp:Label ID="lblThanks" runat="server" 
            style="font-family: Arial, Helvetica, sans-serif; font-weight: 700"></asp:Label>
        <br />
        
       
        
            <br />
        
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <asp:Button ID="btnInfo" runat="server" Font-Names="Arial" 
             style="font-weight: 700" 
            Text="I'd like to receive more information!" Width="261px" 
            onclick="btnInfo_Click" />
        
        <div runat="server" id="info" 
            style="position:relative; top: -1px; left: 7px; width: 463px; height: 415px;">
            <span class="style2">If you would like to join the club or receive more 
            information about the club, fill in the form below and click the submit button.</span><br />
            <br />
            <asp:Label ID="Label1" runat="server" 
                style="font-weight: 700; font-family: Arial, Helvetica, sans-serif" 
                Text="First Name:"></asp:Label>
    &nbsp;<asp:TextBox ID="txtFName" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Label ID="Label2" runat="server" 
                style="font-weight: 700; font-family: Arial, Helvetica, sans-serif" 
                Text="Last Name:"></asp:Label>
    &nbsp;<asp:TextBox ID="txtLName" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Label ID="Label3" runat="server" 
                style="font-weight: 700; font-family: Arial, Helvetica, sans-serif" 
                Text="Phone #:"></asp:Label>
    &nbsp;&nbsp;&nbsp;&nbsp;
            <asp:TextBox ID="txtPhone" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Label ID="Label4" runat="server" 
                style="font-weight: 700; font-family: Arial, Helvetica, sans-serif" 
                Text="Email:"></asp:Label>
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Button ID="Button2" runat="server" onclick="Button2_Click" Text="Submit" />
            <br />
            <br />
            <asp:RequiredFieldValidator ID="validateFirst" runat="server" 
                ControlToValidate="txtFName" ErrorMessage="First Name is Required" 
                style="font-family: Arial, Helvetica, sans-serif"></asp:RequiredFieldValidator>
            <br />
            <br />
            <asp:RequiredFieldValidator ID="validateLast" runat="server" 
                ControlToValidate="txtLName" ErrorMessage="Last Name is Required" 
                style="font-family: Arial, Helvetica, sans-serif"></asp:RequiredFieldValidator>
            <br />
            <br />
            <asp:RegularExpressionValidator ID="validatePhone" runat="server" 
                ControlToValidate="txtPhone" ErrorMessage="Phone Number is invalid" 
                style="font-family: Arial, Helvetica, sans-serif" 
                ValidationExpression="^[01]?[- .]?(\([2-9]\d{2}\)|[2-9]\d{2})[- .]?\d{3}[- .]?\d{4}$"></asp:RegularExpressionValidator>
            <br />
            <br />
            <asp:RegularExpressionValidator ID="validateEmail" runat="server" 
                ControlToValidate="txtEmail" ErrorMessage="Invalid Email" 
                style="font-family: Arial, Helvetica, sans-serif" 
                ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
        </div>
        
        <div runat="server" id="meeting" 
            style="position:absolute; top: 150px; left: 580px; width: 232px; height: 64px; text-align: center; margin-top: 0px; font-family: Arial; font-weight:bold;">
            <br />
    &nbsp;&nbsp;&nbsp;&nbsp;
            <asp:Label ID="Label5" runat="server" Text="Test"></asp:Label>
            <br />
            </div>
        
       
        
        <div runat="server" id="label" style="width: 308px; position:absolute; top: 45px; left: 550px; margin-top: 0px;" 
            class="style1">
            Click Below to find out when
            <br />
            the club meets next</div>
        
        <div runat="server" id="member" 
            
            
            
            style="position:absolute; top: 28px; left:880px; width: 274px; height: 441px; font-family:Sans-Serif;">
            <b>View Members by Program:<br />
            <asp:ListBox ID="ListBox1" runat="server" Height="175px" Width="213px" 
                onselectedindexchanged="ListBox1_SelectedIndexChanged">
                <asp:ListItem Value="all">All</asp:ListItem>
                <asp:ListItem Value="programmer">Computer Programmer</asp:ListItem>
                <asp:ListItem Value="itss">Information Technologies Support Services</asp:ListItem>
                <asp:ListItem Value="analyst">Systems Analyst</asp:ListItem>
            </asp:ListBox>
            <br />
            <br />
            </b></div>
        
        <div style="position:absolute; top: 99px; left: 600px; width: 192px; text-align: center; margin-top: 0px;">
            <asp:Button ID="Button3" runat="server" onclick="Button3_Click" 
                Text="Next Meeting" />
        </div>
        
        </form>
    </body>
    </html>


The problem whenever I click "Next Meeting" nothing happens whereas it should set the label text to Next Available first or third wednesday of the month. It did worked before but since when I copied the whole code to a new website it is not working. What may be the problem? 