hey there i have a simple case of class with static variable and a get function all compile ok but at run time i am getting this error

[Sun Jul 25 03:57:07 2010] [error] [client 127.0.0.1] PHP Fatal error:  Undefined class constant 'TYPE' in .....

fonksiyonu GetType için ()

burada benim sınıf

class NoSuchRequestHandler implements Handler{
    public static $TYPE  = 2001;
    public static $VER   = 0;

    public function getType(){
      return self::TYPE;
    }

    public function getVersion(){
      return self::VER;
    }
}

Hepinize teşekkür ederim