Sliding block pressure switch ignoring moving object

I've been over Despain's tutorial and some others, but I'm at a loss for what I'm doing wrong.

The idea is to have a "pressure plate" switch that will respond to either the player standing on it, or the player pushing a movable empty treasure chest on top of it. Once I can get the first one to work, I'll duplicate it.

Right now the switch responds when the player stands on it, but not when the player moves the box onto it.

The box looks like this: http://imgur.com/fE4lwc4 http://imgur.com/fVyHqoU

The switch looks like this: http://imgur.com/RnR0zCP http://imgur.com/03Bi9p2

The conditional branch lines are cut off in the picture. In the first page, they are:

$game_player.x == $game_map.events[@event_id].x and $game_player.y == $game_map.events[@event_id].y

and

$game_map.events[022].x == $game_map.events[@event_id].x and $game_map.events[022].y == $game_map.events[@event_id].y

In the second page they are:

$game_player.x == $game_map.events[@event_id].x and $game_player.y == $game_map.events[@event_id].y

and

$game_map.events[022].x == $game_map.events[@event_id].x and $game_map.events[022].y == $game_map.events[@event_id].y

Can anyone tell me why this isn't working?