HK-232 TNC troubles

[Hawaiian Shirt Jay, kf6rmg]

   I recently bought a Heathkit HK-232, which is supposedly identical to the
AEA PK-232. The past couple of days I've been trying to hook it up to the
computer in my shack with no luck. The computer simply doesn't want to talk
to the TNC. I tried it at the house of a friend who has the AEA model and it
worked just fine, but when I got it home, the software I'm using (PkGOLD
TestDrive) just kept saying it couldn't find the TNC. So I tried everything
I could think of. I tried switching the software to a simple RTTY program I
downloaded from qrz.com with no luck... I tried attaching the TNC to the
printer port and the serial port, neither of which worked... I even tried
dragging this computer I'm using now into the shack, but still no result.
I'm completely out of ideas, so does anyone have any thought on what I
should try next?
                                                        73,
                                                       Jay, KF6RMG
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