Stepper motors and drivers problem

Using Arduino Motors, Mechanics, Power and CNC
12

Hi.
I have controller like you (Драйвер шагового двигателя SMD-4.2. Купить. ООО Электропривод. ) and bipolar motor stepper(Импортные шаговые двигатели AD-200 NEMA 24. Характеристики шаговых двигателей AD-200.).
Controller and arduino mega connecting :
Digital Pin 2 -> PUL+ (driver 1)
Digital Pin 3 -> DIR+ (driver 1)
And the PUL-, DIR- to the Arduino GND and ENA- unconnected.

Motoro hums, but does not move(

Use Sketch:

int stepM1pin = 22;   
int dirM1pin = 24;   
int enM1pin = 26;
 
int Steps = 10;	 
int Delay = 3;	   
int i;
 
void setup() {
 
pinMode(stepM1pin, OUTPUT);   
pinMode(dirM1pin, OUTPUT);   
pinMode(enM1pin,OUTPUT);
 
digitalWrite(enM1pin,LOW);
digitalWrite(dirM1pin,LOW);
}
 
void loop() {
	  digitalWrite(stepM1pin, HIGH); 
	  delayMicroseconds(3);
	  digitalWrite(stepM1pin, LOW);
	  delayMicroseconds(3);
}

what I'm doing wrong?

ps: sorry for my english )