maybe try adding the following to line 1 of your security assist pages:
<?php session_cache_limiter( 'nocache' ); ?>
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.