Autothrottle Not Working and FMS is working and not working.

[fskev]

Autothrottle is not working after take-off and cruise. I have the airbus Thrustmaster dual TCA Quadrant and Flight Stick. FMS flight plan through SimBrief  works and does not work, however what impacts the FMS is the Autothrottle. I wonder if I have to do throttle calibration with Reverse Thruster on the EFB? Because what normally happens when I fly an Airbus at climb; the autospeed and autothrottle activates and speeds are managed going from MAN TOGA + LVR CLB to THR CLB. That normally is what supposed to happen and I can manage the speeds in Knots or Mach. However, after I take off, the adjustment from MAN TOGA LVR CLB stays there and does not switch to THR CLB with Autothrottle activated. And normally after THR CLB it goes to "Speed" at Cruising Altitude. What am I doing wrong? Please advise.