[Elecraft] K3 with KIO3B and RMS Express

[Reed Bumgarner]

I'm having trouble getting RMS Express to transmit. I've tried various
combinations of RTS PTT settings and am using the digital setting in the
RMS software. The transmit light goes on but no power out and failure to
connect.
Do I need to use port share software with the KIO3B?  Is there another
setting I'm overlooking?
Thanks for any insights.
Reed AA1RB