[Elecraft] KIO3B RTTY AFSK problem with Transmit

[Dan]

Did RU this past weekend and could not get KIO3B to XMIT-Receive is fine using MMTTY and N1MM. Ended up using my Signal Link for XMIT.
Here is what I know.
NO line in or out connections on back of radio (per earlier email I saw)
Radio control, frequency, etc. work fine-just updated firmware
USB Codec shows as USB Codec 3 on computer. I can see AFSK produced in transmit on MMTTY screen and the silly meter in the sound control window. but no audio reaches radio
DATA Mode is set for AFSK A (like I have always used it for SIgnal Link)
Even if I manually turn XMIT on no audio IN. (I am using VOX and not PTT) Do I need to enable PTT?

I have tried switching MIKE to LINE IN to no avail.

What am I missing? Any help here would be appreciated.
Dan W8CAR