GSM CANNOT WORK : IT SAY DB:NO RESP

HELLO CAN SOMEONE HELP ME PLEASE… I’M USING ARDUINO UNO, SIM900A, AND GPS NEO-6MV2 FOR MY PROJECT…
I WANT TO SEND THE GPS COORDINATE TO MY GOOGLE MAPS API… BUT IT SAY AT THE SERIAL MONITOR IS DB:NO RESP…CAN SOME ONE HELP ME

HERE MY CODE

GSM RX → ARDUINO TX 1
TX → RX 0

/*
GSM and GPS code
This sketch code to get geolocation with SIM900 and send the coordinates to API
*/

#include <SoftwareSerial.h>
#include <TinyGPS++.h>
#include <inetGSM.h>

InetGSM inet;
TinyGPSPlus gps;
SoftwareSerial serialGps(11, 10);

/**
setup
*/
void setup() {
// Serial connection.
Serial.begin(19200);

Serial.print(F("------------------------------------------------- \r\n"));
Serial.println(F(“Starting App Arduino”));
Serial.print(F("------------------------------------------------- \r\n"));

// Start configuration of shield GPS NEO-6M with baudrate.
serialGps.begin(9600);

// Turn on GPRS
powerUpGprs();

// Start configuration of shield SIM900 with baudrate and connect to internet.
if (gsm.begin(9600))
Serial.println(F("\nstatus=READY"));
else Serial.println(F("\nstatus=IDLE"));

// Mensure and show memory usage
Serial.println(F("\nMemory usage"));
Serial.print(freeRam());
}

/**
loop
*/
void loop() {
serialGps.listen();
while (serialGps.available() > 0) {
if (gps.encode(serialGps.read())) {
// Get GPS position and send To API through inet.httpPOST()
gsm.listen();
// GPRS attach, put in order APN, username and password.
if (inet.attachGPRS(“diginet”, “”, “”))
Serial.println(“status=ATTACHED”);
else Serial.println(“status=ERROR”);
gsm.SimpleWriteln(“AT+CIFSR”);

Serial.print(F("\r\n\r\n"));
Serial.print(F("------------------------------------------------- \r\n"));
Serial.print(F(" GET GEOLOCATION & SEND TO API \r\n"));
Serial.print(F("------------------------------------------------- \r\n"));
// get geolocation
String geo;
geo.concat(“lat=” + String(gps.location.lat(), 6));
geo.concat("&lng=" + String(gps.location.lng(), 6));
geo.concat("&spd=" + String(gps.speed.kmph()));
geo.concat("&uid=gb1");
// send2Api
Serial.print(F("\nhttp://192.168.1.1/"));
Serial.println(geo.c_str());
Serial.print(F("\n"));
gsm.SimpleWriteln(“AT+CIFSR”);
inet.httpPOST(“192.168.1.1”, 3000, “/geolocations”, geo.c_str(), “”, 100); // set url and port
}
}
}

/**
mensure memory usage
*/
int freeRam() {
extern int __heap_start, *__brkval;
int v;
return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
}

/**
Power up
*/
void powerUpGprs() {
pinMode(9, OUTPUT);
delay(100);
digitalWrite(9, HIGH);
Serial.println(F("\nPower Up SIM900!"));
}

THANKS