The problem could be that you are updating the BIOS from a very old version (0021) to latest version 0066.
This specific model has 15 different BIOS versions, which means there are many fixes between one and another.
What we recommend customers to do is to check how many versions are between the current BIOS and the latest one. Then, depending on that, install or flash 1 or 2 versions before getting to the latest one.
The following link has the release notes for all BIOS versions available for your motherboard http://downloadmirror.intel.com/22828/eng/GA_0066_ReleaseNotes.pdf
At this moment you can try to install BIOS version 0021 again using the BIOS recovery method.
Once you are able to access the BIOS, you can try to install BIOS v0035 and so on.