[Elecraft] K3 MMTTY question

[Phillip Zminda]

I am a total rookie at RTTY but just started to setup MMTTY with my K3  
to have a try at RTTY Roundup this weekend. I can get the K3 to  
transmit RTTY with the K3 in DATA A but when I try AFSK I don't get  
any audio. I am using a Signalink as the soundcard with PTT through  
the Signalink. It's my first try with the Signalink, but I got a great  
deal on it to use it with my K2 and think it's a better soundcard than  
the one I was using. I do have the Signalink K3 cable and internal  
jumpers. I am using the rear panel connections and have line-in  
selected.

I have been using K3 for WSPR and JT65 using DATA A, but never tried  
AFSK. I did match the mark tone pitch at 915 in both the K3 and MMTTY.  
I did a quick try with FLDIGI, which I have never tried before either  
and it seemed to work in either mode but wanted to use K1MM for  
logging since it interfaces with MMTTY.

What could I be doing wrong?

Thanks,

Phil N3ZP