[Zope] Session data timeout reset

I have zope 2.6.2 (win and lin) and would like to know how to stop the */ <http://localhost:9080/manage_workspace>temp_folder <http://localhost:9080/temp_folder/manage_workspace>/session_data <http://localhost:9080/temp_folder/session_data/manage_workspace> *resetting the Data object timeout value back to 20 when the zope server restarts. Can anyone help? Thanks