Flashing CD Rom

Hi i ve got a CDU4811 cD rom…

I ve tryied to flash it in order to have better performances (i had some reading prob with it…) from PY09 to PY0A using the furnished command F1198.exe…
but the flashing process stopped at 26% and now my CD Rom is not recognized “in and by” the bios…It is not functionnal anymore…
Have you ever heard about this prob and have got a solution (e.G an utility which would help me to re-flash it…)??
Waiting for your answers…:rolleyes: