I have a 9200 I was flashing different BIOS’s to just to see if anything would happen. When I flashed it with a 9100 bios it died. Every flash utility told me no device found. I also saw the card in the device manager and with ATI Tool. Only win flash 1.0.5 worked. Reinstall your original bios chip and try it. Once you get the program running I can see no reason why it won’t work. I have "killed" my card many times since with 9600, 9550, 9250, and 9200 bios files. Every time win flash helps me out without any problems. Word of advice from a lesson learned though; backup your PCI bios just in case you accidentally flash it.
Your download of win flash may be corrupt. Try downloading it again. From what I have learned from my “research” is despite what ATI may say the 9200, 9550 & 9600 are all the same chip. There seems to be a difference in the resistor config but it is covered in very tough black crap. You basically need to destroy the gpu to mod it. Anyway what I’m getting at is it will work if your bios chip is still good.