991A Config NO USB Connection

I have a 991a with a bad USB interface. I am using the RS232 and data ports with digi rig. WSJT-X I have cat and ptt working.

ISSUE:
I only hear and see data when mode is set to USB. When I set mode to DATA-USB I do not hear or see any activity. Again in USB Mode, I am hearing data and seeing it on the waterfall as well as in the band activity.

Any suggestions?

Maybe your radio assumes the use of the internal interface when you switch to DATA-USB. Are you able to QSO with mode set to USB?

USB here refers to Upper Side Band, not Universal Serial Bus.