LCD not working

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my lcd not working.
i'm using arduino deumilanove , lcd stuck backlight on , top row illuminated white letters should be.
this 1 of codes i've tried use work.
please help.

code: [select]

#include <liquidcrystal.h>

liquidcrystal lcd(12, 11, 10, 5, 4, 3, 2);

void setup()
{
  lcd.clear();
  delay(2000);
  lcd.print("hello, world");
}

void loop() {}

this happens mine although mine shield.
http://forum.arduino.cc/index.php?action=dlattach;topic=288263.0;attach=107202;image


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