had the same problem when I flashed the XX.201 bios..
It wouldn't flash, just hanged.. I got around it by going to epox's web site and download their latest 8kta2 bios, extracted the awdflash.exe program from it and used that flasher
to flash the msi bios (note: I did not flash the 8kta2 bios, that would be dump - rather I just used the awdflash.exe and flashed the ms6330XX.XXX bios file)
It got around the hung flash problem.