Raw-Dao

[Nem2k]

my dvdrw supports both raw-dao and sub channel data reading, but when i use nero or clonecd to make a 1:1 copy of any safedisc, or safedisc 2 game, it spits out lots of errors and just doesnt work?
im using a philips dvdrw208 (i think) and it doesnt work, are there any special settings i need or special programs for recording (i want to make 1:1 copies of games, i dont want to emulate them) that i need to set?