Switch button Answered

I have connect Arduino with wave shield and 2 switch buttons to play wave when the buttons are pressed but it played it automatically with out any press and it repeat I don't now why ..
void loop()
{
  trackNum = findGPSLatLng();
  Serial.println(trackNum);

  // Get if a button was pushed
  buttonState1 = digitalRead(buttonPin0);
buttonState2 = digitalRead(buttonPin1);


  if(buttonState1 == HIGH && previous1 == LOW && millis() - time > debounce)
  {
    audioSelectFlag = 1;
  }
  else if(buttonState2 == HIGH && previous2 == LOW && millis() - time > debounce)
  {
   audioSelectFlag = 2;
  }


time = millis();


  //  here is the wave files to play
  switch (trackNum) {
    case 5:
    if(audioSelectFlag == 1  || audioSelectFlag == 2)
        playcomplete("1.WAV");
        break;
        case 1:
      if(audioSelectFlag == 1)
        playcomplete("1.WAV");
      else if(audioSelectFlag == 2)
        playcomplete("1b.WAV");
      break;
    case 2:
      if(audioSelectFlag == 1)
        playcomplete("2a.WAV");
      else if(audioSelectFlag == 2)
        playcomplete("2b.WAV");
      break;
    case 3:
      if(audioSelectFlag == 1)
        playcomplete("3a.WAV");
      else if(audioSelectFlag == 2)
        playcomplete("3b.WAV");
      break;

  }
}