Windows 10 PE * add * CLEANMGR.EXE

hello forum.

i've allready made 'my' w10pe sometime ago only for dism capture purposes.
now, i need to add cleanmgr 'DiskCleanUp' to wpe.
like other apps, i've copied the .exe, .mui and the .mun to their respective folders.
i've Add-Package WinPE_OCs\WinPE-WMI.cab to the wpe.
but can't get cleanmgr 'Clean Manager / Disk Cleanup' to work.

any help please?
thank you.
best regards, l.a.