Couldn't get mine working ether so had a quick fumble earlier tonight. Replaced the case PWR connector with that of the one for the remote, attached the small white 3 pin PWR connector attached to the 24 pin atx connector to the relevant adapter (I forgot that one too) and plugged that USB thingie into the USB pins on the mainboard.
Lo and behold, everything worked. Maybe there is something in there you may have overlooked?