Has the enable been connected up yet ?

I would common all the +v inputs to the drivers and use -ve pulses to drive enable, step and direction. There again, I wouldn't use that BoB as it has no relay output (though these can be added with a cheap board) and no 0-10v speed control.

I happily use this board https://www.dropbox.com/s/gfq4isvihn...rd-EN.pdf?dl=0 and have only blown one of them so far (my own stupid fault). At least they are cheap