I was thinking it wasn't working somewhat for same reasons that Craig mentions, I was not sure what part of the the mach software may have those keys reserved. But Allan states there are versions that it does work on or can be mapped on. My build is 3481 so maybe it is possible it has been reserved for a function in the latest build and was not in previous revisions or builds. I sent an email initially to artsoft, as I figured they would know right off if that button is reserved since they developed the program, but have not heard back so I posted the question. I have a little hand held controller that I use for lining up the bit on my mill and zeroing things in by eye with. The buttons mimic specific keys on the keyboard and I know which ones they are but I don't think I can or I don't know how I could re-map that button to a different key.
Thanks for the replies on this.......