I  have developed my own custome registration module. Data is going user table and other table correctly. But when user register , user not login automatically.

I ll put code to here. How can i adjust this code to login automatically

try
       
        {
         // Only attempt a save/update if all form fields on the page are valid
         lblError.Text = "one";
         if ( Page.IsValid == true)           
           
         {
             lblError.Text = "2";
             // update the user record in the database
             UserController objUsers = new UserController();
             UserInfo ObjUser = default(UserInfo);

             if (Id == -1)
             {
                 lblError.Text = "3";
                 ObjUser = new UserInfo();
                 if (PortalSettings.ActiveTab.ParentId == PortalSettings.SuperTabId) {
                     ObjUser.PortalID = -1;
                     ObjUser.IsSuperUser = true;
                 }
                 else {
                     ObjUser.PortalID = PortalId;
                     lblError.Text = "4";
                 }
                 ObjUser.Membership.Username = txtUserName.Text ;
                 ObjUser.Username = txtUserName.Text;
                 ObjUser.Profile.FirstName = txtFname.Text ;
                 ObjUser.Profile.LastName = txtLName.Text ;
              
                 ObjUser.Membership.Email = txtUserName.Text;

                 ObjUser.AffiliateID = Null.NullInteger;

                 ObjUser.Membership.Password = txtPAssword.Text ;
                 Id = objUsers.AddUser(ObjUser, true);
                 ObjUser.UserID = Id;

                 PortalSecurity objPortalSecurity  = new PortalSecurity();

                 objPortalSecurity.UserLogin(txtUserName.Text, txtPAssword.Text, this.PortalId, this.PortalAlias,this.

               //  UserCreateStatus createStatus = UserController.CreateUser(ref ObjUser);

                 lblError.Text = ObjUser.UserID.ToString();
                 //lblError.Text = "5";
                 if (Id >= 0)
                 {
                     DotNetNuke.Services.Log.EventLog.EventLogController objEventLog = new DotNetNuke.Services.Log.EventLog.EventLogController();
                     objEventLog.AddLog(ObjUser, PortalSettings, UserId, txtUserName.Text , DotNetNuke.Services.Log.EventLog.EventLogController.EventLogType.USER_CREATED);
                     Mail.SendMail(PortalSettings.Email, txtUserName.Text , "", DotNetNuke.Services.Localization.Localization.GetSystemMessage(ObjUser.Profile.PreferredLocale, PortalSettings, "EMAIL_USER_REGISTRATION_PUBLIC_SUBJECT", ObjUser), DotNetNuke.Services.Localization.Localization.GetSystemMessage(ObjUser.Profile.PreferredLocale, PortalSettings, "EMAIL_USER_REGISTRATION_PUBLIC_BODY", ObjUser), "", "", "", "", "",
                     "");
                     Response.Redirect(DotNetNuke.Common.Globals.NavigateURL(TabId, "", "filter=" + txtFname.Text.Substring(0,1)), true);
                 }
                 // registration error
                 else {
                     //AspNetSecurity.MembershipCreateStatus UserRegistrationStatus = default(AspNetSecurity.MembershipCreateStatus);
                     //UserRegistrationStatus = (AspNetSecurity.MembershipCreateStatus)UserId * -1;
                     //UserController objUserController = new UserController();
                     //lblMessage.Text = objUserController.GetRegistrationStatus(UserRegistrationStatus);
                 }
             }
             else {
                 // if activating an account, send notification
                 ObjUser = objUsers.GetUser(PortalId, Id);
               
                 if ((ObjUser != null))
                 {
                     //if (chkAuthorized.Checked) {
                     //    //if (ObjUser.Membership.Approved != chkAuthorized.Checked) {
                     //    //    Mail.SendMail(PortalSettings.Email, userControl.Email, "", Services.Localization.Localization.GetSystemMessage(ObjUser.Profile.PreferredLocale, PortalSettings, "EMAIL_USER_REGISTRATION_PUBLIC_SUBJECT", ObjUser), Services.Localization.Localization.GetSystemMessage(ObjUser.Profile.PreferredLocale, PortalSettings, "EMAIL_USER_REGISTRATION_PUBLIC_BODY", ObjUser), "", "", "", "", "",
                     //    //    "");
                     //    //}
                     //}
                   
                     //update the user
                     ObjUser.Profile.FirstName = txtFname.Text ;
                     ObjUser.Profile.LastName = txtLName.Text ;
                  
                     objUsers.UpdateUser(ObjUser);
                 }
              
               //  Response.Redirect(DotNetNuke.Common.Globals.NavigateURL(TabId, "", (!string.IsNullOrEmpty(Request.QueryString["filter"]) ? "filter=" + Request.QueryString["filter"] : "").ToString), true);
             }
         }
     }
     //Module failed to load
     catch (Exception exc) {
         lblError.Text = exc.ToString();
     }