Altec Lansing ACS31 doesn't work with WIN98

My Win98 can not recognize the device
(Atec Lansing ACS31 sound speakers) and
no driver is available. I wonder if I can know from yoy how to make it work, i.e.
where to download a right driver, are
the new drivers for higher models working
for the older models?.

My Win2000 is able to recongize the device
and the sound speakers work great with W2K after having had them for so many years.

Your help is greatly appreciated!