OH4: Denon Marantz: IRP (Internet Recent Play) not working

Setup, Configuration and Use Scripts & Rules
,
1

I have Denon AVR-X2700 and I’m trying to switch to the last internet radio station with a javascript rule.
The avr turns on and the input source says “IRP” for Internet Recent Play but the playback is not starting. What can I do?

if(items.DenonMarantzAVR_Betrieb.state == "OFF")
{    
  items.DenonMarantz_AVR_MainZone_Power.sendCommand("ON");
  java.lang.Thread.sleep(5000);
  items.DenonMarantzAVR_MainZone_Input.sendCommand("IRP"); // Internet Radio Recent Play  
}
else
{
  items.DenonMarantzAVR_Betrieb.sendCommand("OFF");
}