Using a TMC2209 silent stepper motor driver with an arduino

I increased the step time

...

void loop()
{
 
  //make steps
  Serial.println("High");
  digitalWrite(STEP_PIN, HIGH);
  delay(100);
  Serial.println("Low");
  digitalWrite(STEP_PIN, LOW);
  delay(100);
}

but the motor does not move a bit. I can only see the "Low/High" in the serial console