Validation does not fire on click

I have a webform that not only has required field validators but as well as a reqular expression validator. I also have a link button on the form to submit the data and redirect to the next page. Problem is when I run my web form and click the button, nothing happens. It just redirects to the next page without doing either of the validations. I have noticed as well when I take the "ValidationGroup='whatever'" out of the control, it works fine.

I have to validation summaries on the top of the page (one for each group) and the same thing goes with that; once I remove the validation group property, they work.

Here is my code:

<%@ Page Title="" Language="C#" MasterPageFile="~/Styling/Application.Master" AutoEventWireup="true" CodeBehind="app-step1.aspx.cs" Inherits="OnlineEmploymentApplication.Application.app_step1" %><asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"><style type="text/css">

    #personal td
    {
        vertical-align: middle;
    }
    
    #personal input[type=text]
    {
        width: 180px;
    }

    .rowspace
    {
        height: 10px;
    }


    </style></asp:Content><asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"><div class="grid_12" style="text-align: center;"><div class="grid_2 prefix_2 alpha">
    1. Personal Information<hr /></div><div class="grid_2"><span class="prog_current">2. Qualifications</span></div><div class="grid_2"><span class="prog_current">3. Employment</span></div><div class="grid_2 suffix_2 omega"><span class="prog_current">4. Schooling</span></div></div><div class="grid_8 push_2 suffix_2"><asp:ValidationSummary ID="ValidationSummary1" runat="server" ForeColor="Red"
        HeaderText="Please make sure all required fields are filled." ValidationGroup="group1" /><asp:ValidationSummary ID="ValidationSummary2" runat="server" ForeColor="Red"
        HeaderText="test" ValidationGroup="group2" /></div><div class="grid_8 push_2 suffix_2"><h5>Personal Information</h5><table id="personal"><tr><td>Your Name:&nbsp;</td><td><asp:TextBox runat="server" ID="txtName" /><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtName"  ValidationGroup="group1">*</asp:RequiredFieldValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr><tr><td>Street Address:&nbsp;&nbsp;</td><td><asp:TextBox runat="server" ID="txtAddress" /><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtAddress" ValidationGroup="group1">*</asp:RequiredFieldValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr><tr><td>City:&nbsp;</td><td><asp:TextBox runat="server" ID="txtCity" /><asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtCity" ValidationGroup="group1">*</asp:RequiredFieldValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr><tr><td>State:&nbsp;</td><td><asp:TextBox runat="server" ID="txtState" MaxLength="2" style="width: 30px;" /><asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtState" ValidationGroup="group1">*</asp:RequiredFieldValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr><tr><td>Zip Code:&nbsp;</td><td><asp:TextBox runat="server" ID="txtZip" /><asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtZip" ValidationGroup="group1">*</asp:RequiredFieldValidator><asp:RegularExpressionValidator
            ID="RegularExpressionValidator1" runat="server"
        ControlToValidate="txtZip" Display="Dynamic"
        ErrorMessage="Please use proper zipcode format." ForeColor="Red"
        ValidationExpression="\d{5}(-\d{4})?"></asp:RegularExpressionValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr><tr><td>Contact Number:&nbsp;</td><td><asp:TextBox runat="server" ID="txtNumber" /><asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtNumber" ValidationGroup="group1">*</asp:RequiredFieldValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr><tr><td>Email:&nbsp;</td><td><asp:TextBox runat="server" ID="txtEmail" /><asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server"
        ErrorMessage="" ForeColor="Red" ControlToValidate="txtEmail" ValidationGroup="group1">*</asp:RequiredFieldValidator></td></tr><tr class="rowspace"><td>&nbsp;</td></tr></table><div class="grid_1 push_7 alpha omega" style="text-align:right;"><asp:LinkButton runat="server" ID="lbNext" Text="Next ->" OnClick="lbNext_Click" CausesValidation="true" /></div></div></asp:Content>

Here's the code behind. Nothing much yet:

protected void lbNext_Click(object sender, EventArgs e)
        {



            Response.Redirect("app-step2.aspx");

        }

I know I've done this on other forms, but for the life of me I can't figure out what I'm doing different this time.