Greetings,
True you should use pins 2&4... but have you tried 15&17 or 15&19. I have no idea if F6 BIOS would resolve. Downgrade should be possible since gigabyte uses a dual BIOS solution. Maybe someone else can confirm. Rev 1.0 of this board had issues. You might consider opting for rev 1.1. RMA with vendor or Gigabyte may be an option.
Edit ***** Alt & F10 keys during POST will automatically allow you to copy the Main BIOS to the Backup BIOS chip.