ERROR MESSAGE
Server Error in '/' Application.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC30456: 'Checked' is not a member of 'System.Web.UI.WebControls.CheckBoxList'.

Source Error:

Line 8: Dim Message As String
Line 9: Message = "Hello " & txtName.Text & "."
Line 10: If chkTour.Checked Then
Line 11: Message &= " We will send you details of the tour " & _
Line 12: "schedule for " & cboCountry.SelectedItem.Text


Source File: C:\BegWebMatrix\MailingList.aspx Line: 10
__________________________________________________ ________________

The code as I have entered following the book.

Sub Button1_Click(sender As Object, e As EventArgs)
Dim Message As String
Message = "Hello " & txtName.Text & "."
If chkTour.Checked Then
    Message &= " We will send you details of the tour " & _
        "schedule for " & cboCountry.SelectedItem.Text
End If
If radMail.SelectedItem.Value = "HTML Then
    Label1.Text = "Using HTML format for mail. Sending:p />" & Message
    Else
    Label1.Text = "Using plain format for mail. Sending:p />" & Message
    End If
End Sub

found out after googling error message. I used a check box list instead of check box from web controls panel.
Gotta be careful which control i click on.