Harri,
No idea about the K2000 (I use a K2600), but if no reply, you might try at sonikmatter.
There are a lot of K2000 users.
This bbs and sonikmatter is monitored by staff of Kurzweil as is Sonicmatter but they had AES last week, so maybe they took a break..
http://community.sonikmatter.com/noncgi/ultimatebb.php
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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