Having problems using WSJTX's FT8. Works fine on 20 meters, but will not work on 40 meters or 80 meters. Have not tried on any other band. Had initial problems which were solved by reinstalling DAX drivers. I could then work 20, 40, and 80 meters. Now I can only work 20 meters. FT8 shows no band activity. Reloaded WSJTX and reloaded Smart SDR v18.104.22.168 and still 20 meters is all that will work. Any ideas?