I think I've done this before, but I can't for the life of me remember how. I'm using RPG Maker XP, and maybe it's a little different than the older ones, or maybe I'm just amnesiac.

I'm trying to figure out how to make it so that when I push a boulder from quite some distance onto a specific square, a switch is turned on and the boulder is rendered immobile. The way I have it set up now makes it so that, for some reason, I can push the boulder once more after it hits that space, and THEN the switch goes on.

There's probably an easy answer for this one, but I just can't find it.