I've installed an X3 CEmodchip into my xbox ver 1.0. When I tried to flash xecuter 3 bios it gives me "Unable to read HDD first sector getting partition table." I've tried different cables and jumper settings. I checked all the connections are tight. I have 2 different HD (both are original xbox) but gives me same error. How could I get it to detect the HDD so I could flash the bios? Much appreciated if someone could help.