The LM18245 pin 10 has to be grounded to enable the chip . It is connected to pin 1 of conn1 on the picstep and is held high with a 10k resistor to +5
This means you need to ground pin 1 to enable it.
Jumper pind 2and 3 on the Breakout board to ground pin 1 on the picstep.
One a computer is attached yo can jumper pins 1 and 2 using pin 14 to drive the pin to low.
Those looking for circuit look at
https://github.com/alangarf/picstep
PS: I hope you meant you ordered a parallel port /printer cable as you can not run this off a serial port