I have extended my HTTPModule to try and modified the code that is in the cmdLogin_Click code.  The site still redirects in a way that will never resolve.  The code is as follows:

public class SSO_Module:IHttpModule
    {
        #region IHttpModule Members
        public void Init(HttpApplication context)
        {
            context.AuthorizeRequest += new EventHandler(context_AuthorizeRequest);              
        }
        void context_AuthorizeRequest(object sender, EventArgs e)
        {
            HttpApplication app = (HttpApplication)sender;
           
            SSO.SingleSignOnIdentity id = (SSO.SingleSignOnIdentity)app.User.Identity;
            app.Response.Write("IsAuthenticated:" + id.IsAuthenticated.ToString() + "
");
            app.Response.Write("Name:" + id.Name + ", " + id.NameType + "
");
           
            app.Response.Write("

Claims

");
            foreach (SecurityProperty sp in id.SecurityPropertyCollection)
            {
                app.Response.Write(sp.Name + " - " + sp.Value +"
");
            }

            try
            {
                UserCreateStatus objUserCreateStatus;

                //'See if user exists in DNN Portal user DB
                UserInfo objUserInfo = UserController.GetUserByName(0, id.Name);

                //' user does exist - try to create on the fly
                if (objUserInfo == null)
                {
                    objUserInfo = new UserInfo();

                    objUserInfo.DisplayName = id.Name;
                    objUserInfo.FirstName = id.Name;
                    objUserInfo.LastName = id.Name;
                    objUserInfo.Username = id.Name;
                    objUserInfo.Membership.Password = "reallyhardpassword";
                    objUserInfo.PortalID = 0;
                    objUserInfo.Email = id.Name;
                    objUserCreateStatus = UserController.CreateUser(ref objUserInfo);

                    if (objUserCreateStatus == UserCreateStatus.Success)
                    {
                        LetsLogUserIn(objUserInfo, app.Response);
                    }
                    else
                    {
                        objUserInfo = null;
                    }
                }
                else
                {
                    LetsLogUserIn(objUserInfo, app.Response);
                }

                //app.Response.Write("leaving check dnn user for " + objUserInfo.DisplayName);
            }
            catch (Exception ex)
            {
                //DotNetNuke.Services.Exceptions.LogException(ex);               
            }
        }
        private void LetsLogUserIn(UserInfo objUserInfo, HttpResponse response)
        {
            try
            {
                //'Lets log the user in
                UserLoginStatus loginStatus;

                response.Write(
                    "Login check dnn user: current/checking " +
                    "/" + objUserInfo.Username);
           

                Localization.SetLanguage(DotNetNuke.Entities.Portals.PortalController.GetCurrentPortalSettings().DefaultLanguage);

                response.Write("Log them in - INFO coming....");
                response.Write("Log them in user/potal/pid " + objUserInfo.Username);
                UserController.UserLogin(0,
                                         objUserInfo,
                                         "My Website",
                                         HttpContext.Current.Request.UserHostAddress,
                                         false);
                response.Write("Logged in completed");
                
            }
            catch(Exception ex)
            {
                //DotNetNuke.Services.Log.EventLog.logex.Services.Exceptions.LogException(ex);               
            }
        }
 

Any help would be greatly appreciated

As It turns out, I was responding to the wrong event.  Instead of the AuthorizeRequest event, I needed to respond to the AuthenticateRequest event.  The AuthorizeRequest event never got fired. 

I will post a more complete solution in another thread once I get it together.

Thanks,

Richard