I don't have an equinox, but did you cheque the os version????
There's an update on GEM site from may 99.
Very often these keybords/synths come with
Keyboards/Sound Units: Kurzweil 2600S, Roland VR-760, Acces Virus C, Roland G-800, Akai AX60, Minimoog, Machine Drum, Roland R8-M, mediastation x-76