caching and IE 5

Is anyone else having fun and games with IE 5.0 and caching? I have the no-cache code (below) before anything else in my index file. Following that an include file is pulled in that has a form with a text input field that echos the date and time. Whenever I refresh the page the time does not update to reflect the current time, it sticks with the time that was displayed when the page was first loaded. Even when I close the browser and reopen it the time remains the same. Any pointers on this issue? <?php header ("Expires: Mon, 14 Jul 1963 05:00:00 GMT"); // Date in the past header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified header ("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1 header ("Pragma: no-cache"); ?> <input type="text" name="search_name" value="<?php echo "SEARCH ".date("F jS Y G:m A") ?>"> Thx in advance. Karl