Crap.
I've been a bit fast and loose with which version I tested what with. So; here are the results:
On my TOS 1.62 STE the Replicants crack of Audio Sculpture 1.4 works exactly like on Hatari. That means, quite badly - the whole "right click, edit volume name, get the path not found message, retry loading module"-workaround is needed.
The internal test version, with no protection, works just fine on TOS 1.62 STE. _However_ - the original issue found by my group member, that it doesn't work in Hatari, holds true. On the real machine I press Load Module, the Volume name changes (to blank, not the actual volume name of the disk, which indicates some sort of error still), the next Load Module correctly shows the disk content.
On Hatari (STE mode, TOS 1.62, even the same locale) the same thing happens to begin with, clock mouse pointer and change to blank volume name, but the next Load Module press does not show any disk content - only the amount of free space. I'm currently unable to find any workaround - I simply cannot get the file list to appear.
... so:
*) In 2015 we find out that the Replicants crack of AS 1.4 isn't very good, on STE. Looking at the protection code in the source I can fully understand why.
*) However, for the purposes of getting Hatari to emulate the hardware we're now in the situation where I can only show the problem with an internal unreleased version (additionally a build of v1.3 which as far as I know never even made it to the public). So, I'll have to sort that out before I'm able to offer any more insight.
(I'm very very sorry for being lazy and not writing the cracked version to disk earlier - but at least it resulted in some "scene news")
Now I'll look into debugging the offending code in MonST - if I can get that to work then I'll get back with exactly what causes the empty file list ...
/Troed