Simple question- toggle boolean

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1

Why doesn’t the following work?
I know I’m declaring toggler in the wrong place right?
Does it need to be on an onEnterFrame?

var toggler:Boolean = true;
if (toggler == true) {
this_mc.onPress = function () {
tweenUp (this_mc, 5);
toggler = false;
};
}
else {
this_mc.onPress = function () {
toggler = true;
trace (“toggler is now true”);
};
}