iam having a problem finding a textbox inside createuserwizard which is inside a contentplaceholder
i have a custom validator for this textbox ..now when i put this customvalidator outside createuser wizard it says "cannot find controltovalidate control id CaptchaValue "
heres is a row inside my createuserwizard
<CreateUserWizard......>
    :
    :
    :
 <tr>
  </td>
  </tr>
    :
    :
    :
</CreateUserWizard>
and i have a customevalidator outside createuserwizard
 <asp:CustomValidator ID="CustomValidator5" runat="server" ControlToValidate="CaptchaValue"
                                                                               ErrorMessage="Image value must match" ValidationGroup="CreateUserWizard1" 
                                                                               EnableClientScript="False"></asp:CustomValidator>