Cannot engage ATS anymore

[mraviator]

After using ATS successfully on may flights under version 1.0, I seem to have lost the ability to engage ATS altogether. I follow the checklist and always received TO N1. If there was a fail, I clicked the ATS disengage button I have mapped to my joystick. I can still clear the FAIL, but when pressing ATS button (before or after TOGA switch with or without FD showing),  I never get the green lights on either side of the ATS anymore. I end up flying with manual throttle, which works fine as well. But I'm wondering if anything changes on the system, even before version 1.1?