Firmware to pionner k17rs

i have a laptop acer 5050, but dvd writer so burn a 2x how burner a 4x o 8x??
help please
acer website no help me

keep sending acer emails and complain and then tell them you will boycott if they do not work on a firmware and make sure you follow through and buy a non acer laptop next time you buy one or recommend 1.