I see the led light for pluses.
It blinks when I push test button.
Along with status led.
Which LED is the "led for pulses"? Is the the LED labeled "Steps" near the center of the board? And by "along with status led" do you mean that the status LED blinks as well? Or that the status LED turns on and stays on solid (no blinking) when you press the test button?
If the "Steps" LED blinks when you press the "Test" button that means you have the PMDX-126 in TEST MODE. And when in TEST MODE it ignores the signals from the ESS. Set the PMDX-126 DIP switches for "normal mode without charge pump" (all switches pressed or slid towards the "Config 1', etc. silkscreen and away from the "open" silkscreen).
Then press and release the TEST button once to activate this new mode. After you release the TEST button, you should see the "Status" LED off, the "steps" LED off and the "Outputs Enabled" LED on. Pressing and holding the TEST button you should see the status LED on solid, the "steps" LED off, and I don't remember what the "Outputs Enabled" LED does while the test button is pressed. I think it turns off, but I'm not sure.
With the DIP switches in this setting, can you get the ESS to control any output signal on the PMDX-126 (like mapping the "spindle on" signal to PMDX-126 port 1 pin 1, which is the large relay on the 126 board)? Again, see the suggestions in the other thread.