Tasmota MP3

I have a problem with the mp3 player, command line control works fine.
The problem occurs when controlling MQTT, all commands end with error “stat / mp3_264385 / RESULT = {” Command “:” Unknown “}”

The device name is mp3_264385
Publish theme cmnd / mp3_264385
Subscribe cmnd / mp3_264385
MP3Play, MP3Track command
What could be the reason ?

I coped.
For those with the same problem, the solution is the right topic.
Subscribe cmnd / mp3_264385/mp3play
cmnd / mp3_264385/mp3track
and so on