IIS 6 with SP2 becomes unresponsive

MailSite Express can experience slowness or cause the server to have a very large Cache directory due to a fault with the Operating system within Service Pack 2 for Windows 2003 Server.

MailSite Express uses sessions to keep track of users progress through the Express application.  When they logout and the application tries to fire the Session_OnEnd from within the global.asa it does not function. This will cause the Cache directory to fill up with old information and leave the system with a lot of stale sessions open.  This can also cause other issues which are detailed in the Microsoft KB document, please follow this link KB934903

To download the hot-fix please click on this link hot-fix.