Yvon,
Are you using the same Nano as the one where the original software worked?
If you used a Nano that was not working before, you need to recalibrate and adjust the BFO.? Here is the process to do with the ORIGNAL software that comes with the v6:
What software are you trying to load on the Nano???
Here is a link to a message with instructions and other links to more instructions:
/g/BITX20/message/93703There were reports on some of the N8ME variants not storing the calibration values correctly.? The way to overcome that was to use the original HFSignals software to calibrate, then load the new software on the now-calibrated Nano.
Original software from Ashhar Farhan/HFsignals:
Video to show how to load new firmware:
73
Evan
AC9TU