Did you make sure that the floppy is bootable by booting another system from it (make sure that you first rename the autoexec.bat file to not flash the other system)?
The size of the flash can't be 0 bytes as it would be an empty and useless file. If need be, you could download the latest version from ftp://ftp.biostar-usa.com/drivers/utility/ (AWDFL882.EXE).
To work, the file has to be renamed from AWDFL882.EXE to AWDFLASH.EXE or you have to change your command line in Autoexec.bat.
Finally, is the floppy accessed when you power up the PC?