System.Web.HttpException: A field or property with the name 'ID' was not found on the selected data source.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Web.HttpException: A field or property with the name 'ID' was not found on the selected data source. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [HttpException (0x80004005): A field or property with the name 'ID' was not found on the selected data source.]    System.Web.UI.WebControls.BoundField.TryGetSimplePropertyValue(Object dataItem, Object& data) +3254863    System.Web.UI.WebControls.BoundField.GetValue(Control controlContainer) +209    System.Web.UI.WebControls.BoundField.OnDataBindField(Object sender, EventArgs e) +58    System.Web.UI.Control.OnDataBinding(EventArgs e) +92    System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +85    System.Web.UI.Control.DataBind() +15    System.Web.UI.Control.DataBindChildren() +187    System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +94    System.Web.UI.Control.DataBind() +15    System.Web.UI.WebControls.GridView.CreateRow(Int32 rowIndex, Int32 dataSourceIndex, DataControlRowType rowType, DataControlRowState rowState, Boolean dataBind, Object dataItem, DataControlField[] fields, TableRowCollection rows, PagedDataSource pagedDataSource) +167    System.Web.UI.WebControls.GridView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +3724    System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +67    System.Web.UI.WebControls.GridView.PerformDataBinding(IEnumerable data) +14    System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +123    System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +33    System.Web.UI.WebControls.DataBoundControl.PerformSelect() +138    System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +30    System.Web.UI.WebControls.GridView.DataBind() +4    System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +105    System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +75    System.Web.UI.Control.EnsureChildControls() +83    System.Web.UI.Control.PreRenderRecursiveInternal() +42    System.Web.UI.Control.PreRenderRecursiveInternal() +155    System.Web.UI.Control.PreRenderRecursiveInternal() +155    System.Web.UI.Control.PreRenderRecursiveInternal() +155    System.Web.UI.Control.PreRenderRecursiveInternal() +155    System.Web.UI.Control.PreRenderRecursiveInternal() +155    System.Web.UI.Control.PreRenderRecursiveInternal() +155    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +974

My code:

Page Title="Log In" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Login.aspx.cs" Inherits="WebApp.Account.Login" %>
<script runat="server">
protected void LoginButton_Click(object sender, EventArgs e)
{
}
protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
 
{
}
protected void SqlDataSource2_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
{
 
}
protected void SqlDataSource3_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
{
}
</script>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Log In
</h2>
<p>
Please enter your username and password.
<asp:HyperLink ID="RegisterHyperLink" runat="server" EnableViewState="false">Register</asp:HyperLink>
&nbsp;if you don't have an account.
</p>
<asp:Login ID="LoginUser" runat="server" EnableViewState="false" RenderOuterTable="false">
<LayoutTemplate>
<span class="failureNotification">
<asp:Literal ID="FailureText" runat="server"></asp:Literal>
</span>
<asp:ValidationSummary ID="LoginUserValidationSummary" runat="server" CssClass="failureNotification"
ValidationGroup="LoginUserValidationGroup" />
<div class="accountInfo">
<fieldset class="login">
<legend>Account Information</legend>
<p>
<asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">Username:</asp:Label>
<asp:SqlDataSource ID="SqlDataSource3" runat="server"
onselecting="SqlDataSource3_Selecting"
ConnectionString="Data Source=JAMES-LE5530\DTSI08R2EXPRESS;Initial Catalog=DTSIEmpPro;Integrated Security=SSPI"
SelectCommand="SELECT [Username] FROM [UserData]"></asp:SqlDataSource>
<asp:LoginView ID="LoginView1" runat="server">
</asp:LoginView>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource3"
EmptyDataText="There are no data records to display.">
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" />
<asp:BoundField DataField="Username" HeaderText="Username"
SortExpression="Username" />
<asp:BoundField DataField="Fname" HeaderText="Fname" SortExpression="Fname" />
<asp:BoundField DataField="Lname" HeaderText="Lname" SortExpression="Lname" />
<asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
<asp:BoundField DataField="Password" HeaderText="Password"
SortExpression="Password" />
<asp:BoundField DataField="Location" HeaderText="Location"
SortExpression="Location" />
<asp:BoundField DataField="Department" HeaderText="Department"
SortExpression="Department" />
<asp:BoundField DataField="Phone_Work" HeaderText="Phone_Work"
SortExpression="Phone_Work" />
<asp:BoundField DataField="Phone_Mobile" HeaderText="Phone_Mobile"
SortExpression="Phone_Mobile" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Data Source=JAMES-LE5530\DTSI08R2EXPRESS;Initial Catalog=DTSIEmpPro;Integrated Security=SSPI"
SelectCommand="SELECT [dbo].[Username] FROM [UserData]"
ProviderName="System.Data.SqlClient" onselecting="SqlDataSource1_Selecting">
</asp:SqlDataSource>
<asp:TextBox ID="UserName" runat="server" CssClass="textEntry"></asp:TextBox>
<asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName"
CssClass="failureNotification" ErrorMessage="User Name is required." ToolTip="User Name is required."
ValidationGroup="LoginUserValidationGroup">*</asp:RequiredFieldValidator>
</p>
<p>
<asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">Password:</asp:Label>
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
EmptyDataText="There are no data records to display.">
<Columns>
<asp:BoundField DataField="Password" HeaderText="Password" SortExpression="Password" />
</Columns>
<FooterStyle BackColor="#99CCCC" ForeColor="#003399" />
<HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="#CCCCFF" />
<PagerStyle BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
<RowStyle BackColor="White" ForeColor="#003399" />
<SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
<SortedAscendingCellStyle BackColor="#EDF6F6" />
<SortedAscendingHeaderStyle BackColor="#0D4AC4" />
<SortedDescendingCellStyle BackColor="#D6DFDF" />
<SortedDescendingHeaderStyle BackColor="#002876" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="Data Source=JAMES-LE5530\DTSI08R2EXPRESS;Initial Catalog=DTSIEmpPro;Integrated Security=SSPI"
SelectCommand="SELECT [dbo].[Password] FROM [UserData]"></asp:SqlDataSource>
<asp:TextBox ID="Password" runat="server" CssClass="passwordEntry" TextMode="Password"></asp:TextBox>
<asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password"
CssClass="failureNotification" ErrorMessage="Password is required." ToolTip="Password is required."
ValidationGroup="LoginUserValidationGroup">*</asp:RequiredFieldValidator>
</p>
<p>
<asp:CheckBox ID="RememberMe" runat="server" />
<asp:Label ID="RememberMeLabel" runat="server" AssociatedControlID="RememberMe" CssClass="inline">Keep me logged in</asp:Label>
</p>
</fieldset>
<p class="submitButton">
<asp:Button ID="LoginButton" runat="server" CommandName="Login" Text="Log In" ValidationGroup="LoginUserValidationGroup"
OnClick="LoginButton_Click" />
</p>
</div>
</LayoutTemplate>
</asp:Login>
</asp:Content>

Any ideas?