Code not working

[GrahamDouglas62]

We have accurately followed the code described in your document: "Maker-SphereMotorShieldv1.pdf". we have only one motor connected to MOTOR1 connectors.
We are using the following code to get the motor the run with no luck.

From PiMotor import Motor
import time
m1 = Motor("MOTOR",1)
m1.forward(50)
time.sleep(2)
m1.stop()

We have successfully copied PiMotor.py to the local folder on the Raspberry Pi.
We are getting no errors and are seeing "Forward" and "Stop" as a result when we run the code. However the motor does not spin as expected. Are we missing a simple step that your documentation skips? If we connect the motor directly to the battery pack it spins fine. When connected via the motorshield hat, nothing.