[SOLVED]how to send command to Gsm module from Arduino via serial port

Am using SIM7600X 4G HAT module (GSM) and Arduino Uno
after I start the module and Arduino, I receive data from Gsm module but I can't send any command to it.
On my Arduino board when I get data RX led flashing, and when I send command TX led flashing.

#include <SoftwareSerial.h>
SoftwareSerial myserial(3, 4); // gsm_TX, gsm_RX

void setup(){
  myserial.begin(9600); //Initialize GSM serial port
  Serial.begin(9600); //Initialize Arduino default serial port
}

void loop(){
  while(1){
    while (myserial.available()) {
      //Serial received data, output via mySerial.
      Serial.write(myserial.read());
    }
    while(Serial.available()) {
      //myserial received data, output it via Serial.
      myserial.write(Serial.read());
    }
  }
}

As the picture I send "AT" command or any command it no response. it show only module start up command.

My circuit