Orff Instruments Not Sounding Correctly

So for us elementary educator people, I am trying to get my Orff orchestrations to play back. Metallaphones and xylophones won’t play back.

After spending a lot of time playing around in “Play” mode as well as looking at HELION instrument assignments I believe I have found the problem.

The keyboard at the bottom of the page when I click that sideways “e” thing shows notes are grayed out. I believe I need to extend the range somehow.

Is there a way to do this that isn’t a multi-layerd overly complicated work-around and hopefully that doesn’t require any knowledge of coding or computer programming?

I mean, computer issues certainly are interesting and who doesn’t like a puzzle, but at this point I just want to get the work done, time is tight.

Can you supply a document showing the problem?

Is it simply that the range of samples in HALion doesn’t cover the expected Alto and Bass ranges?

If you use the GM Glockenspiel and GM Xylophone instruments, they have a range over the entire keyboard.