Asp.net required field validator and button response.redirect

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ASP.NET

Hello programmers, got a few problem here. As you see Ive added required field validator on two textboxes.

<asp:TextBox ID="txtCourseTitle" runat="server" Width="345px"></asp:TextBox>
               <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtCourseTitle"
                   ErrorMessage="needed" Font-Italic="True" Font-Size="X-Small"></asp:RequiredFieldValidator></td>
           <td>
           </td>
       </tr>
       <tr>
           <td style="width: 133px; height: 26px;">
               Course Code:</td>
           <td style="height: 26px">
               <asp:TextBox ID="txtCourseCode" runat="server" Width="345px"></asp:TextBox>
               <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtCourseCode"
                   ErrorMessage="needed" Font-Italic="True" Font-Size="X-Small"></asp:RequiredFieldValidator></td>

My problem is when I click the cancel button the required field show stating that I have to input first before leaving the page? Is there any possible way to cancel the field validator when clicking the cancel button? Thanks and more power
Ive tried adding this code but it doesnt work

Protected Sub btnCancel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnCancel.Click
      txtDuration.CausesValidation = False
      txtCourseTitle.CausesValidation = False
      btnCancel.CausesValidation = False
      Response.Redirect("CourseList.aspx")
  End Sub