Glad I could help as well. I remember clearly how frustrating it was to figure out. Too bad I didn't remember that clearly how I fixed it!
I read this topic. It is very interesting.
I am in a similar situation but i am working with kl-4030.
KL-4030 Driver, Kl23H286-20-8B Motor, C10 BOB, 36V power supply (for the driver), 5v 1000mA power supply (for the C10).
FORGET this !!!
I tried something new and it works !!!
If someone have the same config as mine and the same issues, my topic is here :
Parallel port voltage issues
So ... no need help (not yet) !!