Having trouble with on() and off() method

Having trouble with on() and off() method

I'm an old newby to jQuery and encountered a problem with the on() and off() method.
At the end of a game some buttons are switched of:
  1. if (good == all){
  2.             $(".knop").off("click");
  3.             $(".knop").css({"cursor":"default"});
  4. }
This works good. However:
  1. $(".knopReset").click(function() {
  2.       $(".knop").on("click");
  3.       $(".knop").css({"cursor":"pointer"});
  4. })
doesn't set the buttons to work. The cursor becomes a pointer, but "click" is not activated.
What went wrong? Thanks in advance, Henk