WAIT, given the case the IPSW file might be corrupted, have you tried re-downloading it?
E 3014 means that Apple Server connection couldn't be stablished.
E 3004 if i can recall correctly means that the update is corrupted, so try replacing the file.
E 3014 means that Apple Server connection couldn't be stablished.
E 3004 if i can recall correctly means that the update is corrupted, so try replacing the file.