Cant update my bios ;s

mall

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Jan 7, 2010
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Hey all!
Got a GA-MA785GM-US2H rev 1.1 motherboard ofc gigabyte ;)
But now its so that i cant update the bios ;s
I download the proper bios @ their official site, and put them on a cd.
But when about to install it says that i have improper version, and that it doesnt work with my 64 bytes system, anyone got any ideas? ;s
Thanks in advance!