Thanks, it's working now. The device mgr showed a problem with the AIRcable so I reinstalled the driver and now there's an entry for "AIRcable USB serial port
Peter, If there isn't another COM port listed other than your USB serial adapter, this indicates the AirCable USB adapter isn't installed correctly in Windows.
Dwight, The robot and the PC are not communicating. This could be due to incorrect settings. If you reinstalled your USB serial port, windows may have used a