ecm replacement now no engine brakes

[Bengy88]

Ok so I checked all of his settings/parameters, pulled the ecm image and applied a template from old to new ecm, flashed a factory file in the truck, flashed a custom file in the truck, and pulled the file from old ecm and put in new and engine brakes still won’t work. I’m pretty sure he has an ecm problem because they work with the old ecm and not the new.