Nec3500 & Ritek R01 Problem

hello, I have the following problem with Ritek R01(burnt at 4x):
firmware LD 2.TA,LD 2.TB and 2.FD_QV3ME can record them (nero, RecorderNow, etc… ) but they cannot be read with Nec3500,Liteon 166S and Lg4081B; they don’t work. :frowning:
But with firmware LD 2.T9 and previous they are recorded and they are read without any problem. :slight_smile:
Some idea?