[Elecraft] com port PTT question

[DK5EW]

Hello all,
I have a small problem with PTT via com port and ACC plug.
I made a 2 pin cable 9pol from PC to ACC 15pol to K3.
I soldered pin 4 for PTT and pin 5 for ground.
I tested it for correct wire and short - all O.K.
Now as soon I connect the TRX-ACC and the com port (serial 9 pin) to my 
PC the K3 goes on TX.
Any solution out there ?

-- 
best regards
Erwin/DK5EW




-----
eMail ist virenfrei.
Von AVG überprüft - www.avg.de
Version: 10.0.1410 / Virendatenbank: 1520/3907 - Ausgabedatum: 19.09.2011