MY liteon 1633 and datawrite classics 8x -r?

Hyaz all…ill try an keep this simple I had an older dvd writer 4x write max i think and i got rid of it and bought a liteon 1633 16x write etc on my old writer i had made some data backups onto the datawrite classic 8x dvd-rs i had they burnt and played back perfect…on the OLD writer ;(
in the new writer they just spin and spin…it tries to read the header etc but cant…i really need to get 2 these disc`s
any suggestions :wink:

BTW i have flashed the liteon with the latest firmware at present BSOR i think and was told i cannot backwards flash the drive now…is this true?