Particle system rendering behind meshs/models

Hello,

As you can see the screenshot below, I want to show the particle system in correct depth like which Scene window showed, it's render in front of the Space Shuttle. But no matter how I adjust the sorting layer or layer order("green rect area"), it's doesn't work. The result is alway particle system render behind the Space Shuttle.

note: In my project, the meshs/models(Space Shuttle) are all in the Default layer, and the particle system is at the Partical System layer.

Thanks in advance for any help.