Hibernation option when you click "Turn Off Computer"

Operating system (which I use): Windows XP Professional

Issue: When I go to the "Start" button and click on "Turn Off Computer" I see three options, "Stand By" "Turn Off" and "Restart". If I'm at this screen its always to turn the computer off, but where is the hibernation option ? I do have "Enable hibernation" checked in the power options.

Solution: Press the "Shift" key and the "Stand By" option will change to "Hibernate".