Cannot flash older bios

I put kd7cs bios on my kd7-raid. It didn't seem very stable so I tried to put kd7c8.

The problem is it doesn't want to install - it says wrong part for this bios file...

How can I force it? Can it be because c8 is older version then cs?

Anybody else with the same problem?

Not really, there have been a lot of issues with the C8 BIOS. When I flashed to it I didnt have a setup screen so I flashed back to B8. There are currently 2 versions of the C8 BIOS one with 262,144 bytes & another with 262,145 bytes(wrong), I sugest having a look at the file size if you really want to use C8.

Thanks a lot. abit-usa.com has the right file while abit.tw has the wrong one with an extra byte at the end.