Thanks for the suggestion ger21. I installed Windows 8.1, Mach3, the NcPod driver & my configXML on my pc (Dell T1700) but I can't see the NcPod in Device Manager, and there is no prompt to install device drivers ethier. Mach3/PlugIn Control tab shows an option 'ncPod V2.00.059 Config'. This config box has no options selected except 'Homing=No Homing' & 'Servo Cycle Time=0.00084 Seconds per segment'. Any thoughts? Thanks - Alex.