I know, I know, this SUCKS, but pc's and MPC's cannot talk to each other via scsi. Read up on some of the akai sampler forums floating around on the web and they all say the same thing. You need to use something like a zip to be the mediator. the MPC cannot and will not recieve scsi information from you pc like the S series do. This is a complete and utter bummer. akai needs to get off their asses and fix this bug if it is an OS issue, and if it is hardware, well, shit, start over!
sorry man, I just learned this a few days ago and my heart is broken as well. No windows editors for the mpc..... :[