Dvd-rom drive failure

hi all
my dvd drive failed and I have replaced it with a h22n lg unit, this has worked up to a point it plays now our dvd’s and formats and records to dvd-rw’s but wont record to dvd+r or dvd-r discs and wont format them properly either. Is it possible that I may have a purchased a damaged drive, I have updated the firmware, is it possible to flash a h22n drive with h55n firmware to try and correct the problem.
many thanks