How to enable - disable MC buttons?

hi,

i’ve got several buttons, which i must enable, and after an other “onPress” action on an other button, i must “re-enable” them…

for disable, it work…i use :

this.onPress = false;
this.onRollOut = false;
this.onRollOver = false;

but for enable :

this.onPress = true;
this.onPress = enabled;

don’t work …why ?