[Elecraft] K-3, N1MM, MK2R+ setup assistance requested

[Milt, N5IA]

Esteemed Reflectees;

I have historically done my SO2R operating with a pair of FT1KMPs and a home 
brew black box constructed from the directions in the NA manual.  I used NA 
as the logging program.  It all worked VERY well.

Recently I have upgraded the primary contest radios to Elecraft K-3s, and 
the logging computer to one which does not have com ports on it.  I have 
also started using N1MM as a Windows base logging program.

So, nearly the whole combination is new.  I have been unable to get my 
"black box" to work with N1MM and and USB to serial adaptors.

The reason for this message request is for someone out there to assist me so 
I don't have to totally reinvent the wheel with my new acquisition.

I have taken the plunge and purchased one of the MicroHam MK2R+ devices.  I 
have set it up as near to the instructions in the MK2R+ manual and the N1MM 
manual that I can discern.  I find both manuals not totally in tune with the 
other's requirements and I am sure somewhere I have checked a box that 
shouldn't be or failed to check a box that should be checked.

I have the radios talking to N1MM and I have both TX and RX audio passing 
through the MK2R+ box.  What I have not been able to make work is the PTT 
and the audio codec recordings for SSB.  I have not yet tried to set up CW 
or RTTY.

So, after all that explanation, is there someone(s) out there who might have 
this combo playing that could give me some direction of what to look for 
that is causing the lack of PTT response and how to make the audio codec 
recordings play.  I am using the Heil Pro headset.

Ideally, I would like to call someone on the telephone who has this combo 
working and go over the setup step by step until the problem is discovered. 
Anyone out there fit the description?  If so, reply to me directly with your 
contact info and availability timing.

Thanks in advance for any assistance.

Milt, N5IA