How to change tap to click using "defaults write" from command line?

I want to change the trackpad tap-to-click property from the command line. Graphically, I can do it by clicking System Preferences -> Trackpad -> Tap to Click. How can I do it from the command line? I have tried: defaults write com.apple.driver.AppleBluetoothMultitouch.trackpad Clicking -int 0 defaults write GlobalPreferences com.apple.mouse.tapBehavior -int 0 but these didn't work (with int as 1 and 0, with reboot). Am I missing some step? I have Macbook 5,1 Snow Leopard.