Comboboxes do not allow logical values.
Try setting the Value property in the Properties window to .F. - you will get a "Property value is invalid error."
Why not use a checkbox and set its InteractiveChange() and ProgrammaticChange() events e.g.,
this.Caption = IIF(this.Value=.T., "ACTIVE", "INACTIVE")
this.InteractiveChange()
Insanity: Doing the same thing over and over and expecting different results.