Cant upgrade firmware on 166S

I’ve got a DVD ROM HD166S with D166DS0B firmware.
I want to upgrade firmware and I can’t do it.When I execute the flash program, my computer hungs with the message “Write profile to driver’s DRAM” in flash program.
I’ve tried with 3 or 4 different firmwares (S14, S18…), with the same results.
What could i do???

You could try using another flash tool. LtnFlash, mtkflash, or MTK WinFlash might work better.

Start here: http://digi.rpc1.org