Ok thats good and it means driver is working fine.
Test with a meter at the port like I mentioned and see if you get the voltage. You can also test the Step pin to Gnd with the voltmeter, depending on the active low setting you will either see 5v and go slightly lower as you jog or 0v and maybe 200mV (depends on frequency) as you jog. If you are seeing that then test at the far end of the cable.
Hood