PX4 fixed wing auto landing unsuccessful

I followed the website https://pixhawk.org/users/fixedwing_autoland to make the fixed wing auto landing,and I set three points they are takeoff waypoint and land , the altitude are all 3 meters relative to home, but when I change the flight mode from stabilized to mission the plane landed directly , here is the log fle http://logs.uaventure.com/view/MQBDLvcNFkry7iF6GSfJcJ , mission file in the attachments, which step do I mistake? THanks for any helpmission.pptx (32.1 KB)

hi @leijian_yu,
have u found the root cause of the behaviour?
same here.