Asus motherboard and amd cpu compatability

I recently purchased a sabertooth 990fx r2.o md and a amd fx8350. I know I have to update the bios for to support the cpu. However, I have problems trying to use the flashback button on the mb. My present bios version is 0803. I downloaded the the version 1101 to a fat32 formatted flash drive, renamed to ST990R20.CAP. I then plug the flash drive to the MB, press the flashback button for 3 seconds got a blinking light for about 5 seconds and it turn steady. I on for an half hour, and then turn on my system and I can't boot into windows and uefi indicates that bios version did not change. Can someone tell what the heck I'm doing wrong.
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More about asus motherboard compatability
  1. Hi, Have you connected the flash drive to the Flashback USB port (the one between the Flashback button and the audio ports)?
    Have you unzipped the downloaded file and then renamed?
    Try a different USB stick if available.
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