Code Failing

#include <IRremote.h>
#include <IRremoteInt.h>

#include <ir_Lego_PF_BitStreamEncoder.h>
#include <boarddefs.h>

#include <NewPing.h>

int IRpin = 9;  // pin for the IR sensor
IRrecv irrecv(IRpin);
decode_results results;


//Tell the Arduino where the sensor is hooked up
NewPing sonar(12, 13);

int enableA = 11;
int pinA1 = 6;
int pinA2 = 5;

int enableB = 10;
int pinB1 = 4;
int pinB2 = 3;

long inches;

void setup() {
  pinMode(enableA, OUTPUT);
  pinMode(pinA1, OUTPUT);
  pinMode(pinA2, OUTPUT);

  pinMode(enableB, OUTPUT);
  pinMode(pinB1, OUTPUT);
  pinMode(pinB2, OUTPUT);

  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
}

//Define high-level H-bridge commands
void enableMotors()
{
  motorAOn();
  motorBOn();
}

void disableMotors()
{
  motorAOff();
  motorBOff();
}

void forward(int time)
{
  motorAForward();
  motorBForward();
  delay(time);
}

void backward(int time)
{
  motorABackward();
  motorBBackward();
  delay(time);
}

void turnLeft(int time)
{
  motorABackward();
  motorBForward();
  delay(time);
}

void turnRight(int time)
{
  motorAForward();
  motorBBackward();
  delay(time);
}

void coast(int time)
{
  motorACoast();
  motorBCoast();
  delay(time);
}

void brake(int time)
{
  motorABrake();
  motorBBrake();
  delay(time);
}
//Define low-level H-bridge commands

//enable motors
void motorAOn()
{
  digitalWrite(enableA, HIGH);
}

void motorBOn()
{
  digitalWrite(enableB, HIGH);
}

//disable motors
void motorAOff()
{
  digitalWrite(enableB, LOW);
}

void motorBOff()
{
  digitalWrite(enableA, LOW);
}

//motor A controls
void motorAForward()
{
  digitalWrite(pinA1, HIGH);
  digitalWrite(pinA2, LOW);
}

void motorABackward()
{
  digitalWrite(pinA1, LOW);
  digitalWrite(pinA2, HIGH);
}

//motor B controls
void motorBForward()
{
  digitalWrite(pinB1, HIGH);
  digitalWrite(pinB2, LOW);
}

void motorBBackward()
{
  digitalWrite(pinB1, LOW);
  digitalWrite(pinB2, HIGH);
}

//coasting and braking
void motorACoast()
{
  digitalWrite(pinA1, LOW);
  digitalWrite(pinA2, LOW);
}

void motorABrake()
{
  digitalWrite(pinA1, HIGH);
  digitalWrite(pinA2, HIGH);
}

void motorBCoast()
{
  digitalWrite(pinB1, LOW);
  digitalWrite(pinB2, LOW);
}

void motorBBrake()
{
  digitalWrite(pinB1, HIGH);
  digitalWrite(pinB2, HIGH);
}

void loop() {

  //Run the motors at slightly less than full power
  analogWrite(enableA, 200);
  analogWrite(enableB, 200);

  if (irrecv.decode(&results)){  //this checks to see if a code has been received

    if (results.value == 0xFF18E7){  //if the button press equals the hex value 0xC284
      analogWrite(enableA, 255);
      analogWrite(enableB, 255);
      forward(100);
    }

    irrecv.resume(); //receive the next value
  }

}