Please follow below steps:
First, press the button for a little longer, preferably for more than 1 second.
Second, if the remote control still cannot control the flame-out. Try to re-pairing the remote control.
Pairing method: Press and hold the one-key start button on the panel for more than 5 seconds, until the green light on the button is always on, then press the remote control button "on" or "off" until the light is off. Then the repairing is successfully. (On our user manual also has this repairing method. )
If repairing still not working, need to change the remote control key.