I'm at the office, so have to remember later to share configuration. Although it might be better that you share yours to me, since the issue might be elsewhere in your setup.

One thing that strikes me however, is that on your screenshot I see ctrl-maj-alt-& and not ctrl-maj-alt-1. I see in French keyboard shift-1 is &. Can I ask how did you select this binding? Did you press the keys, or select from drop-down? Maybe you can try with non-numeric bindings for the macros, e.g. ctrl-shift-alt-G ctrl-shift-alt-H ctrl-shift-alt-J etc

Another option is to simplify the whole thing: put the macro into WoW itself, on button 1, and in your Alt-Mouse5 mapped key just send '1'. So to test if the Alt-Mouse5 binding even works.