IIGS MS-DOS FST Problem

[Dean Shutt <junk@punaka.com>]

A quick, and I suspect classic, question.  Could not find it in the
latest faq though.

I am setting up yet another Apple II.  This system is:

IIgs rom 3
superdrive
superdrive controller card
ae GS ram fully populated with 6 meg
system 6.0.1 installed on superdrive

Everything works fine EXCEPT I can not read MS-DOS disks on the
superdrive. I installed all the optional FST using the 6.0.1 installer
and I have verified the FST files are in the FST folder.  Superdrive
and controller card are known good and check out perfectly in my IIe
system and read MS-DOS disks there.  1.44 Prodos disks can be
written/read/initialized with no difficulty.  Loading an MS-DOS disk
into the drive results in a short drive spin up and nothing else.
Disk does not appear on the desktop in any form.

Surely I must be missing something simple but currently do not have a
clue as to what it might be.  Any help would be most appreciated.