We have a classic asp web app running on win03/IIS6. The app works correctly on dozens of servers, but when we installed on one customer's hosted server, the session gets lost quite frequently (for all users), about every 5-10 minutes or so.
Session timeout is set to 60 minutes in IIS and is not set any place in the code. Implementations on other servers do not have this problem. Cookies are enabled on client pc's. The session gets lost in various places throughout the app. It's sporadic, not linked to a certain page or a certain user.
I need some pointers as to where I should start looking. How can I troubleshoot this?