:
Do'h 
You hit the point that i couldn't put in: Door... :/
I tried every door properties but always crashed... 
I replaced door with birdportal...  |
You have to make sure the door leads to a screen where there is a door.
Example: If I set the door properties like this.
Level: 1
Path: 2
Camera: 3
Then I must make sure that there is a door on level 1 path 2 screen 3.