Ok, here is the problem.

Projects Programming
12 
unsigned long pingRange (byte pingPin)
{
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(pingPin, LOW);

  pinMode(pingPin, INPUT);
  return pulseIn(pingPin, HIGH);
}