Need Help! Support for leafboy77 USB BOB

I have bought a USB breakoutboard Leafboy77, for 4 axis. I think it's also called AKZ250.
But I have problem though I need a slave axis.
I have set it up as X, Y and Z axis, and added A axis as slave.
But A axis doesn't move.
I can run all axis separate.
Anyone know how to set this up for slave, or does this card not support slave axis?