2 wire Auto start/stop with DSE4620 not working

I’ve bought a generator with a DSE4620 controller.

i know you can see more data with the dse855 module but for now i want to try the 2 wire auto start/stop.

Input A should be configured to a remote start according to the manual.

As stock in the settings of the controller, configuration parameter 301 was configured as option 15 which is: Remote start off load.

But when i close the relay on the cerbo, nothing happens, below is a list of all the parameters i can choose from

The options i’ve tried without succes: 0, 15, 16, 19

The option that does start the generator is option 20: Simulate start button, however, when disconnecting the relais, the generator does not stop.

input B, C and D are all in use so i cannot use that option to stop the generator.

what am i missing for this to work?