You probably need to downloadd2x-v9-beta. You need to add these files into the folder with the d2xinstaller app. Check the read me file for exactfile location. v9 beta has better usb compatability. CFGusbloader and usbloader gx booted fine after the installed d2x v9. I have a toshiba convio 750GB. I installed d2x v9 in 2 spots base 56-ios 248 and base 57-ios247. hope this helps good luck.