Tandem StepGen

recently i change my Y AXIS wiring. at first i use to wire Y AXIS Motor 1&2 step & dir together to the board but now i tandem my Y Axis but my Y Axis do not move if i open QtPlasmaC my Y Axis look gray. 

It will be grayed out until the machine is homed. 

Thanks very much. After homing all it worked.