I encountered same issue "Login/Register Popup" with DNN 6.2.0.

From Chris's advise, it worked on my localhost by modified following part:

1.admin\Skins\Login.ascx.cs (popup login)
//loginLink.NavigateUrl = Globals.LoginURL(returnUrl, (Request.QueryString["override"] != null));
//enhancedLoginLink.NavigateUrl = loginLink.NavigateUrl;

                    var url = Globals.LoginURL(returnUrl, (Request.QueryString["override"] != null));
                    loginLink.NavigateUrl = (PortalSettings.EnablePopUps && PortalSettings.LoginTabId == Null.NullInteger) ? UrlUtils.PopUpUrl(url, this, PortalSettings, false, false, 300, 650) : url;
                    enhancedLoginLink.NavigateUrl = loginLink.NavigateUrl;

2.admin\Skins\User.ascx.cs (popup register)
//registerLink.NavigateUrl = !String.IsNullOrEmpty(URL)
//                    ? URL
//                    : Globals.RegisterURL(HttpUtility.UrlEncode(Globals.NavigateURL()), Null.NullString);
//enhancedRegisterLink.NavigateUrl = registerLink.NavigateUrl;

                        var url = !String.IsNullOrEmpty(URL) ? URL : Globals.RegisterURL(HttpUtility.UrlEncode(Globals.NavigateURL()), Null.NullString);
                        registerLink.NavigateUrl = PortalSettings.EnablePopUps && PortalSettings.LoginTabId == Null.NullInteger ? UrlUtils.PopUpUrl(url, this, PortalSettings, false, false, 600, 950) : url;
                        enhancedRegisterLink.NavigateUrl = registerLink.NavigateUrl;

It compiled successfully and worked well in my local machine.

I also want it works as well on my hosting server.
I tried to copy *.dll files under bin folder to web hosting server, but it doesn't work.

Any body knows how to let the hosting server works (popup login) as my localhost?

Thanks in advance.

After changing a DLL file on a ISS you have to run a IISreset to empty the IIS Cache.  Some times a restart of the application pool did all you Need.  The application pool could be restarted over the DNN Host Settings.

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Regards

Matthias

DNN MVP

www.aarsys.de

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