MP3 Trigger V2 + Arduino Problem

I have an arduino uno hooked up via GND + TX to a sparkfun MP3 Trigger v2’s GND + RX.

I have installed the Mp3 Trigger library and the code I have is as follows

#include <MP3Trigger.h>
MP3Trigger trigger;
  
const int sensor = A0; 

 
int valueP = 0;
int buttonState = 0;

 
void setup()
{
  trigger.setup(&Serial);
  Serial.begin( MP3Trigger::serialRate() ); 
}
 

void loop()
{
  valueP = analogRead(sensor);
  
  if (valueP < 200)
    {
 
          
         
          trigger.trigger(1);
          
    }     
}

When the sensor value goes below 200 the TX light on the arduino turns on equally with the mp3 triggers light going off.

So I should be getting audio, but I’m not.

I dont know if the code for triggering track one is the right one or not ?

Any help would be much appreciated.