win2k..grrr

Hey, Does anyone know WHY form scripts, that submit to themselves, dont work on windows boxes?? Example : I have a script called mail.php. The first part of the script displays the form whos action states, mail.php. When the form is submitted, the second part of the script mails the form details out.. this works fine on linux.. but on windows, only part one is displayed again and again... when i seperate the 2 components, it works fine. Regards, Kunal Jhunjhunwala