[Elecraft] N1MM and K3 always on transmit problem

[DBellW6AQ at aol.com]

I switched computers and now, just getting N1MM on screen causes the K3 to  
transmit.  The K3 works as usual with N1MM off and vice versa.  Phone  or 
CW, VOX on or off, no matter.  When N1MM and the K3 are on together, the  K3 
is in transmit.
 
Any help?
 
73, Dave