Collision masks, solids & overlapping

Hi, this is probably something really simple, but it's driving me mad. I have a sprite that will function as a sort of elevator that the player can jump into - it is using a collision mask so that the player can sit 'behind' some of the graphic but not fall through the floor. The problem is that I can't seem to get the player and the elevator to recognize a collision. If I remove the 'solid' attribute from the elevator then the collision registers, but it also renders my elevator useless. I'm sure it's something basic, but what am I doing wrong here?

dl.dropbox.com/u/70305965/collisions.cap

i think you should post this in (How do i...) section.

also the capx does not work i think

The player and elevator will recognize a collision only if the player's collision mask overlaps the elevator's collision mask. Sense the player and the elevator are both solid, they'll never overlap eachother's collision masks.

Try overlaping at offset Y=-15.

Thanks shadowlord - that did the trick!