I am trying to progammatically create members using an asp:CreateUserWizard. Eventually I would like to use a user control for creating members, but for now I have the CreateUserWizard in a template.  The code is below:

<%@ Master Language="C#" MasterPageFile="~/umbraco/masterpages/default.master" AutoEventWireup="true" %>

  <script runat="server">

protected void registrationWizard_CreatedUser(object sender, EventArgs e)
{
    Roles.AddUserToRole(registrationWizard.UserName, "Managers");
}

protected void registrationWizard_ContinueButtonClick(object sender, EventArgs e)
{
  Response.Redirect("/");
}

</script>
<asp:Content ContentPlaceHolderID="ContentPlaceHolderDefault" runat="server">
  
  
<form id="testForm" runat="server">
  <asp:CreateUserWizard ID="registrationWizard" OnContinueButtonClick="registrationWizard_ContinueButtonClick" OnCreatedUser="registrationWizard_CreatedUser" runat="server">
    <WizardSteps>
        <asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server"></asp:CreateUserWizardStep>
        <asp:CompleteWizardStep ID="CompleteWizardStep1" runat="server"></asp:CompleteWizardStep>
    </WizardSteps>
  </asp:CreateUserWizard>
  </form>
</asp:content>

This code is tested and works as expected when using umbraco 4.5.2 with .NET 3.5.  However when I use the same code with .NET 4.0, I recieve an YSOD "Duplicate User name! A member with the user name xxxxxxx already exists" regardless of what user name I enter.

As far as I can tell, the only difference between the site where this code works and the site where it doesn't work is that one is .NET 3.5 and the other is .NET 4.0.

Has anyone had any luck programmatically creating members in Umbraco with .NET 4.0?

Thanks in advance!

--Mike