Took off on a flight and when I went to put the MCP in command mode, the buttons had no effect. The click spots were working but the a/p did not activate. I had no errors or warning. Everything else was functioning as expected just no autopilot.
I suspect it might be something I forgot but can't seem to see what.
Is there something I missed or could it just be an aircraft initialization issue.
This is using HF3.

Thanx,
Vic