Arduino +cnc shield

Good morning all
Looking for some help with arduino + cnc build.
Have built all the engineering bits and loaded software.
On start up its goes through homing sequence and sets both az and el.
When I send rotcl command the pc displays the position sent but the stepper motors do not move.
The fact that it performs homing sequence with no problem makes me think the hardware is working correctly.
Any suggestions ?

Many thanks

Peter (G4GRK)

I have been building one lately and it works fine. what is your command line for the rotctld ?
Have you tried running it directly to a serial terminal?