From the manual you posted....
This motor is a bipolar-hybrid and must be driven by a chopper drive controller such as the 1063 - PhidgetStepper
Bipolar 1-Motor
Now, I have no clue what that means, but is the 298 a chopper drive controller?
It also says in the manual:
The acceleration of a stepper motor is an important consideration when driving a load. Setting the acceleration too
high can result in the motor stalling, especially with a heavy load.
So that might be why it's not moving?