[Elecraft] K3: Configuring N1MM to send CW

[Bill Feidt]

I'm trying to set up N1MM to send CW to my K3 for ARRL DX CW next weekend.  I'm 
using the USB to Serial cable supplied by Elecraft.  The computer radio control 
is working fine and I'm able to get spots, change bands, QSY to spots, etc. I'm 
set up for SO1V. I've checked "CW" box on the same port (COM4) as is used for 
radio control. The N1MM K3 "SupportedRadios" page 
(http://pages.cthome.net/n1mm/html/English/SupportedRadios.htm) says,

   The K3 accepts CW on DTR (pin 4) of the same COM port
   you're using to control the K3. Set N1MM to send CW on
   that port (Ports setup), and set PTT-KEY (second K3
   CONFIG menu) to OFF-DTR, and set the K3 for QSK. In
   other words, you don't need that transistor adapter unless
   you want to do SO2R.

However, when I set PTT-KEY to OFF-DTR, the K3 goes into "Test" output mode and 
the transmitted in keyed continuously until I take it out of OFF-DTR.  The K3 is 
set for QSK.

What am I doing wrong?

Any insight will be very much appreciated.

73,

Bill/NG3K