[Elecraft] Not able to transmit in AFSK A mode

[NK6A-Don Minkoff]

I have always used AFSK data mode with MMTTY for all my RTTY contests 
and operating.  I have since upgraded to a new PC (Windows 10) and for 
some reason after re-installing all my programs, I can only get tones 
out on the K3 when I change to DATA A mode.

I know it is not my sound card and  have looked over all my settings in 
MMTTY.  Not sure where to look next.

Thanks,

-- 
Don Minkoff
NK6A
IDXC April 15-17, 2016