arduino dont working dc motor

1AF_DCMotor motor(1);
2
3void setup() {
4  Serial.begin(9600);           // set up Serial library at 9600 bps
5  Serial.println("Motor test!");
6
7  // turn on motor
8  motor.setSpeed(200);
9
10  motor.run(RELEASE);
11}
12
13void loop() {
14  uint8_t i;
15
16  Serial.print("tick");
17
18  motor.run(FORWARD);
19  for (i=0; i<255; i++) {
20    motor.setSpeed(i);  
21    delay(10);
22 }
23
24  for (i=255; i!=0; i--) {
25    motor.setSpeed(i);  
26    delay(10);
27 }
28
29  Serial.print("tock");
30
31  motor.run(BACKWARD);
32  for (i=0; i<255; i++) {
33    motor.setSpeed(i);  
34    delay(10);
35 }
36
37  for (i=255; i!=0; i--) {
38    motor.setSpeed(i);  
39    delay(10);
40 }
41
42
43  Serial.print("tech");
44  motor.run(RELEASE);
45  delay(1000);
46}
47