Well, I have one drive LG GSA 22N in another pc, and one LG GSA-4167B in this PC. I tried to verify the manufacturer of my CD's with the nero infotool and nero CD\DVD Speed but in manufacturer ID just appear : n\a. After this I tried the CD-R Identifier (v1.63) but it don't recognize my drives (in the 2 PC's), the version of NERO is 7.7.5.1.The DVD's aren't trouble 'cause I get the DVD Indentifier and it works.Do you have any sugests of what's gonna happening or what I Can do to know who is the manufacturer ID of CD-R's?

PS:I'm dont Know if here is the correct section to post doubts about this.

Since now, thanks by your help.Sorry by my bad english.