AKAI Professional MPX8

doesn't work with my SD card. it was formatted correctly, as were the samples, and it just decided it didn't want to comply, and the midi adapters are loose and unreliable as a result.
Thomann were kind enough to replace it for me, but the replacement had the same issue, I'd imagine to the dismay of them as much as it was to me. I tried it with 2 seperate 2gb cards, both with the same result. The stock samples are OK, but there aren't a lot of them at all and of course that's all I have to work with...
TLDR: your SD card might not work with it, even if you do everything right, and not reliable enough for live use.