SITL AUTO mode does not work

Control : PixHawk PX4FMUv2
firmware: Plane 3.7
CGS : 1.3.39 / 1.4.1.3(beta)
X-Plane:10.45/10.50/10.51(r1)(Beta)

X-Plane 10.45/10.50 , I See GPS3D,But Aircraft location wrong。
X-Plane 10.51r1,start up auto mode the aricraft route is in chaos,I do not konw what is it doing…-_-“ I confirmed that waypoint was entered。

Should be how to do…?

http://ardupilot.org/dev/docs/sitl-with-xplane.html