Operation is not valid due to the current state of the object

Question

Here I am try to submitting values into sharepoint using createuserwizard Control

I am getting this error: Operation is not valid due to the current state of the object with the following code ....

protected void CreateUserWizard1_CreatedUser1(object sender, EventArgs e) {

    try
    {

        SPSecurity.RunWithElevatedPrivileges(delegate()
        {

            using (SPSite sites = new SPSite("http://choudary:22483/"))
            {

                using (SPWeb webs = sites.OpenWeb())
                {



                    sites.AllowUnsafeUpdates = true;
                    webs.AllowUnsafeUpdates = true;
                    SPList list = webs.Lists["Userdetails"];

                    SPListItem newItem = list.Items.Add();

                    newItem["Title"] = CreateUserWizard1.UserName;
                    newItem["FirstName"] = ((TextBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("FirstName")).Text;
                    newItem["LastName"] = ((TextBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("LastName")).Text;
                    newItem["Organization"] = ((TextBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("Organization")).Text;
                    newItem["EMail"] = CreateUserWizard1.UserName;

                    //newItem["Status"] = "Not Started";
                    //newItem["Priority"] = "Normal";

                    newItem.Update();
                    //webs.AllowUnsafeUpdates = false;
                    //SaveToList();
                }
            }
        });



    }
    catch (Exception Ex)
    {
    }


}