Danni,
SEQ is in their list stating R + W, so if it doesn't work, I would send them an email. They used to be very supportive, so they might even have a solution for your other extensions.

Fred
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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