As the topic suggests I am having trouble passing data through session variables. My code works perfectly fine on my development machine where I use Apache 2.2 with PHP 5.3.6 on Windows server 2003. On the testing machine the code does not work as expected because the data does not get passed on from one page to another since session data gets lost or does not get stored at all. How can I overcome this? I cannot install anything on the testing machine, like the newer version of PHP or apache, because the production site mirrors the testing machine and hence making any change on this machine will affect the the main production site.