Collision doesn't work [SOLVED]

Hello again. I'm making a little script of player collision with Key - if player collects key - it destroys himself and the door opens. Everything went smoothly, but now i changed character and collision script doesn't work. Play can't collide with doors, keys, etc..
My character is Ramona Flowers. Her collision boxes are all right and she is perfectly functionable. I tried it with Stencyl Book Monkey and it doesn't collide too..

try setting key to true and then kill self

It didn't help.
Collision doesn't work at all - My actor Ramona (and others) just don't collide with any other actors. Strangely, collision with regions works just fine... what the problem could be?

It could be your actors physics settings, or thier collision groups.

It could be your actors physics settings, or thier collision groups.

What exactly should i be looking for?

This may help.

http://www.stencyl.com/help/view/collisions-and-groups/

Make sure to check your actors and key's group that they are set to collide with each other

Yeah, the problem was with a actor type. Thanks, guys!