re-reflashing firmware update on pioneer dvr-A09

hope i dont confuse people. i updated the firmware on my piopneer dvd burner because of some problems. now like 2 years later the problems are back again same issues the ones that the firmware update resolved. at the site pioneers site they say that i can only flash the drive once. i tried to do the firmware again it wont allow me to do it. question is , is there a way to reflash again or is my burner a great paper weight now?