FindControl ERROR

Question

need to store additional userinfo in CUW steps

//register.aspx

         <p>
         <b>HomeTown:</b><br /> <asp:TextBox ID = "HomeTown" runat ="server"></asp:TextBox>
         </p>
         <p>
         <b>HomepageUrl:</b><br /> <asp:TextBox ID = "HomepageUrl" runat ="server"></asp:TextBox>
         </p>
         <p>
         <b>Signature:</b><br /> <asp:TextBox ID = "Signature" runat ="server"></asp:TextBox>
         </p>
         </asp:WizardStep>
         <asp:CompleteWizardStep runat="server" />
      </WizardSteps>
   </asp:CreateUserWizard>

//THIS is part of code behind WizardStep UserSettings = NewUserWizard.FindControl("UserSettings") as WizardStep;

     // Programmatically reference the TextBox controls
     TextBox HomeTown = UserSettings.FindControl("HomeTown") as TextBox;...ERROR Object reference not set to an instance of an object. 

thanks for help