IR Led and Phototransistor connection give always 0 value

firstly hello everyone,

i planned make wheat grain counter. use phototransistor , ir led count them all. have arduino uno, used 470 ohm resistor ir led, 10k ohm resistor 3 pin phototransistor , connecting phototransistor a0. codes are

code: [select]

int tran=a0;
int reslt;
void setup()
{
  serial.begin(9600);
  pinmode(tran, input);
}

void loop()
{
  reslt = analogread(a0);
  serial.println(reslt);
}

and on serial monitor 0 value. ? have do. want phototransistor when grains pass through between phototransistor , ir led, counter increase havent connected them truely yet...

sounds wiring error.  how wired?

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