Can't read PCM with BenchTop Harness

tunercats, OBD1 pcm. Cant get pcm to read. tried it in the car and benchtop.
I've talked with andrew at AKM cables several times and he's at a loss to until he can get his hands on the lab top. I've tried several things. Switching comports, disabling Bluetooth.
I've got a new Dell Inspirion if that helps.
any suggestions???

is your check engine light on when the PCM is in the car, and the car is running?

another thing i might add is that the car was dyno tuned a couple months ago with no problem.