[Elecraft] K3 Paddle RTTY

[Bert via Elecraft]

It's been ages since I tried sending RTTY from my K3 using paddles; I've  
been using a SignaLink USB for RTTY for the past couple years! Anyway, I  set 
up the K3 for FSK D, plugged the paddle into the paddle socket on the back  
of the K3, and no RTTY! 
So I checked cabling, etc., and still no RTTY using paddles. I switched  
over to CW mode and CW worked just fine! Back to FSK D and no RTTY. I have my  
call in an M1 macro, so I pushed M1 and got RTTY (text decoded properly!). 
Then  I tried the paddles again -- nothing! So I pressed M1 and after my 
call was sent  and the FSK was "diddling", my paddles worked! When the diddling 
stopped, the  paddles no longer produced RTTY.
What am I missing here? 
Bert, N4CW