Android: maybe a bug on new Switch?

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http://stackoverflow.com – From API 14 android introduce the Switch http://developer.android.com/reference/android/widget/Switch.html If I try to use _switchOnOff.setChecked(false); the Switch change it's color correctly from Blu to Grey, but do not return to off position. I tried also _switchOnOff.toggle(); But it's the same, the color is corrected, but the position of the switch remain the same. So i do not understand, it is normal ? Is there a method for switch movement ? Thanks in advance (HowTos)