IF YOU CONTINUE TO HAVE PROBLEMS LOGGING IN: it is likely your browser settings. To test this, please try the Mozilla Firefox browser (it is free, quick install, spyware free, and very good). You can get it at:
http://www.mozilla.com/firefox (link opens in new window).
If firefox works, you know it is your browser settings.
If this fails - try turning off your firewall, and reloging in. If this works, you know it is your firewall settings. You can then turn your firewall back on, and try to allow traffic and cookies to/from *.gatewars.com.
If all this fails, please send an email to email@example.com and include a screenshot if possible of this page, and as much detail as possible about your setup and errors you get.