The page cannot be displayed

Hi All, I'm in troubles when I access Horde using win32 clients. This is a aplications built in PHP. I can see (and fill) the form `horde/imp/login.php'' but when it calls for redirect.php'' (this file is at same folder that login.php) then I receive the famous `this page cannot be displayed''. I've read the php documentation but I dont think this is the problem...... Using unix clients the things goes very well... What did I go wrong ?? See ya, Marcelo Pereira Unicamp - Brazil