Check the drivers are installed correctly and that you are not using a fake FTDI chip.
With the board unplugged check tools->port. Then plug it in, check it again. If there is a new port use it, if not you have not got working drivers.
Check the drivers are installed correctly and that you are not using a fake FTDI chip.
With the board unplugged check tools->port. Then plug it in, check it again. If there is a new port use it, if not you have not got working drivers.