Just to be clear, you do have an Edirol UM-1X USB/MIDI Interface, correct? I know that the link you provided was for this unit but you never actually said that you physically had this unit.

So, if you in fact do have the UM-1X, did you happen to plug it into your PC USB port prior to installing the driver software? Doing so can keep the proper driver software, once downloaded and installed from recognizing the device, in this case the UM-1X.

Or did you download this driver in order to connect the K1000 to the PC via USB ports on the computer and the K1000? This is assuming the K1000 even has a USB port.

Best Regards,

Dave