Brake lights not working on trailer

[m3buzz]

I am having the issue described a couple of posts above - PDC doesn't deactivate, brake lights don't work on the trailer but all of the other lights and signals do. They are LED lights, but I tried with incandescent and the same result.
I am able to do coding (or will be soon, the laptop is set up and the cable works). But when I use NCSExpert, there is no AHM module to choose from or read/write. That could I guess be the problem, but in coding - how do you actually place a module / code where none exists already? Is is factory tow-equipped, so I have no idea why I can't see that module - is it part of another of the long list that comes up?

[cbracerx]

Thanks, I have the same issue with no brake lights as the OP. I do need the coding done, so I guess I need to search for a friendly remote coding provider