How do i put my liteon 411s back to stock

i have a aftermarket firmware and i need to put the drive back to stock cause the cd drive never wants to open up… it had been doing this before i did the firmware but i needed to try something… now when i try to redo the firmware… the software tells me that the drive i have is not meant for the firmware im using

Use FlashFix to modify a flash tool or LtnFW to flash a binary onto the drive and replace the EEPROM with a backup.