did you put the right hard back in the right box cause i got error six when playing around with hard drives and it was cause the eeprom didnt match the right box, any hopefully the first thing you did when you could ftp was saved the eeprom, as long as you have a chip in your box you can fix everything easily with the eeproms, or xboxhssm i hear will help you out too but you really need those eeproms