The old one Broadlink RM1 not work

HI,I have two Broadlink RM1,This is the earliest Broadlink IR controler.
In Broadlink RM Switch page(https://www.home-assistant.io/components/switch.broadlink/)
I add code in configuration,but my RM1 not work.
I can use Broadlink App control RM1.
I think my homeassistant works is OK,because I can use it control Broadlink SP1 mini switch.
So,How can I fix it?
Thanks.