When I connect these esc’s from receiver they work fine. But, they do not play well with my Pixhawk.
Are there any suggestions to get these to work?
It seems they do not work. I did some tests on one, and provided a possible reason why they don’t work. Further investigation is needed.
You maybe able to runa test for me. If you boot your pixhawk and once started, then plug in the emax esc, does it work then?
Hello Bill;
I have been away until today.I will try your suggestion andd let you know if that works. 
Well, I consider the issue with emax 40amp esc’s solved.They were sold on ebay. 