GIGABYTE latest / beta BIOS for Intel CPU motherboards

[walber01]

ok, guys, I put an question in GGTS, but my question wasn't answered til now.
I have an mobo GA-Z68X-UD3H-B3 - rev 1.3, and I'd like to update my bios from f12 to uefi ( U1l ) that is the newwst bios to my mobo.
but I tried all the ways I found on the NEt, all the programs to usb bootable, and this part worked, what not worked was the update.
I was always receiving a message like " fixture is not removed or swiitch is not set to ON".
after all I used my usb drive in a USB port sata 2 ( sata 3 did not work ) and the process was normal, and my PC restarted, but was again in f12.
what I did wrong ?
I'd like very much to upgrade to this new bios.