Session cache problems in PHP

I have a problem using Sessions currently in PHP (I am using IE6).

I have 2 pages - a form into which the user submits his data and a registration form which checks the data for any errors. My problem is that, if there is an error and I go back one page (using either the Back button or javascript:history.go(-1); ), change a value then resubmit, the old value still persists and is the one actually added to the database.

At the moment I am using the following headers on BOTH the form page and the registration page:

session_start();
session_cache_limiter('nocache');
header("Cache-control: no-cache, must revalidate"); // IE 6 Fix.
header("Pragma: no-cache");

Can anyone help? I've read there are problems with caching in IE6, but thought this would cure them.

Here's the headers i found once when you don't want a page to cache:



perhaps that will help you along a bit?

Yeah I saw that code as well, but tried it and no luck. When I submitted and went to the register page, then clicked back, modified one of the text fields and submitted again, it still went with the old field value.