There are several good tutorials on the web about testing motors to determine the coils/phasing. Stepperworld.com has a pretty good one.On the xylotex board,you MUST follow proper setup procedure,or you might damage the board.Be very careful,check all connections,and power supply polarity,and reference voltages ,set them a little on the low side at first.Then re-check them all 4 or 5 more times exactly like the instructions state. Use a quality voltmeter.Be very careful,then re-check the Vref,hook up the motors....it'l work,Did you check the reference voltage?