You may not be using in, the way you meant to.
A good example of this..
PHP Code:
//#CLIENTSIDE
function onCreated() {
setTimer(0.05);
}
function onTimeout() {
if (player.x in |20,40| && player.y in |20,40|) {
player.chat = "You are in the zone!";
}
setTimer(0.05);
}