Not sure how KACE works, but presume it installs stuff as SYSTEM. Use/run psexec.exe -i -s cmd.exe to run a cmd as SYSTEM, so you can test the installer. If you lazy and dont like psexec.exe, you can use PowerRun as an alternative (GUI).
Depending on the installer, if you have logging then enable it, that will inform you of why it failed.
If it's working on some machines and not others, it could be that the installation is restricted to certain operating systems. You can check this in the Managed Installation Detail screen (look for a shaded box). If needed, you can edit the list to add or remove some operating systems.
Hope this helps!