how to make task scheduler do a task when user log off

Hi, I hope the title says it all. In task scheduler you have trigger option such as
1. On a schedule
2. At log on
3. At startup
4. On idle
5. On an event
6. At task creation/modification
7. On connection to user session
8. On disconnect from user session
9. On workstation lock
10. On workstation unlock

I am looking for trigger option that allow me to do task on user logoff/reboot/shutdown. I have tried "On disconnect from user session", and it did not work.

Anyone has any ideas?


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