max_file_size problem

Hi, I've made the following form: it asks the user to upload new logo image. <form name="looks_conf" enctype="multipart/form-data" action="<?php print $PHP_SELF;?>" method="POST"> <input type="hidden" name="MAX_FILE_SIZE" value="100000"> Logo: <input type="FILE" name="header_logo"> <input type="Submit" name="update" value="Save"> </form> But. If I try to load a picture larger, than 100000 byte, after the submit the browsers address bar does not change, but "The page cannot be view" standard page comes. What is wrong? How the size bound works? Thanx Franz