DVD player problem

[Pepper_RJ]

My computer has the following configuration:
1) Motherboard; Asus A7V8S-X w/ processor Athlon XP 2000 and 512 MB of memory
2) Hd 40 GB 7200 rpm
3) Zip dirve 100 mb
4) CDRom LG GCE 8140B
5) DVDRam LG GSA 4081B
6) Case ATX w/ 400 w power source
7) O.S.: Windows XP Professional Edition w/ SP 2

Erery thing was working fine until couple months ago but sundendly the DVD player stops reading DVD´s.
The BIOS and Windows recognize the player (LG GSA 4081B).
In order to check what the problem is I:
1) Installed the DVD in other computer and it works fine.
2) I changed the logical cable.
3) I formaed the HD and installed Windows and Windows Media Player 10.
4) I updated the firmware of the player (v A140)
5) I used the Nero tool that let me know what kins of midia was in the player, but Net said that it was empty.
6) I noticed that music and data CD´s works fine. The same thing happens with DVD´s recorded by companies.
7) I look for informations at Internet sites, but I could not see any situation like mine.

Any sugestion ?

Thanks in advance,,

Pepper_RJ (Sergio)

Rio de Janeiro - RJ - Brasil