what you need is the PCPROG like the guy said above. i have one...it seems its just a serial to USB converter (i could probably make one) its 40.00 from dynojet (in american funny money that is). it will come with the power adapter and a usb cable and the pcprog and a mini-cd (yes, the small ones) of the dyno jet utils in a flash (as in web) based utility that will allow firmware upgrades and what not. you didnt happen to try a firmware upgrade on this did you? cause certain firmwares cant be flashed via usb (or it will brick) and you need to use the pcprog. also, it cant be flashed when the bike is running (durr ta durr).
post back if your still having trouble cause ive been down this shitty road before. i know ill get flamed, but PCIIIs suck...one thing i miss is my zukies reflashable stock ECU. the stock ecus almost never dump.
but its probably a good idea for you to get the pcprog anyways...it will save your ass sometime i bet (and others too) i know mine did.