Maxbotic Sonar not working on the Cube with ArduCopter 3.5.7

I know this topic is not new, but up to now, my Max sonar does not work on pixhawk 2 - the Cube.
I have checked all thing that could be searched: wire, firmware, Topic about this issue, but I haven’t seen any Solution that was checked. I don’t know much about code developing, so if you have a solution for my case, please guide me step by step.
Thank you very much!!