I think your server can't accept POST calls, and enters the site in the address bar... (ultimatebb.cgi) For example http://www.mecz.pl/cgi-local/ultimatebb.cgi?ubb=agree -> 'Accept' in Polish -> http://www.mecz.pl/cgi-local/ultimatebb.cgi; http://www.mecz.pl/cgi-local/ultimatebb.cgi?ubb=login -> 'Login' in Polish -> http://www.mecz.pl/cgi-local/ultimatebb.cgi