John, apparently there is a problem with some M-Audio controllers. I found this on the Motifator site: http://www.motifator.com/forums/showflat.php?Cat=1,2,4&Board=MotifRack&Number=171779&page=0&view=collapsed&sb=5&o=&fpart=1
It seems like you might want to contact the manufacturer.

--Barry
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Yamaha: Motif XF6 and XS6, A3000V2, A4000, YS200 | Korg: T3EX, 05R/W | Fender Chroma Polaris | Roland U-220 | Etc.