Arduino - Por que no se me conecta el arduino a mysql?

#include <Ethernet.h>

#include <MySQL_Connection.h>

#include <MySQL_Cursor.h>

byte mac_addr[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress server_addr(127,0,0,1);  // IP of the MySQL *server* here

char user[] = "root";              // MySQL user login username

char password[] = "";        // MySQL user login password

// Sample query

char INSERT_SQL[] = "INSERT INTO `valores`(`valores`) VALUES ('higiu')";

EthernetClient client;

MySQL_Connection conn((Client *)&client);

void setup() {

  Serial.begin(115200);

  while (!Serial); // wait for serial port to connect

  Ethernet.begin(mac_addr);

  Serial.println("Connecting...");

  if (conn.connect(server_addr, 3306, user, password)) {

    delay(1000);

  }

  else

    Serial.println("Connection failed.");

}

void loop() {

  delay(2000);

  Serial.println("Recording data.");

  // Initiate the query class instance

  MySQL_Cursor *cur_mem = new MySQL_Cursor(&conn);

  // Execute the query

  cur_mem->execute(INSERT_SQL);

  // Note: since there are no results, we do not need to read any data

  // Deleting the cursor also frees up memory used

  delete cur_mem;

}