Help with GWA 4080N please!

Hello!

I have an LG GWA-4080N, in a laptop hp pavillion zv5376ea.
The problem is that 2 days ago I tried to burn some dvd+r Verbatim 16x certified, with the nero 6.3.1.6, and i burnt some data (divx movies) in one of them, an iso image in another and a dvd video in another one. The process of burnt was ok until i tried to check the new dvds. They seem to be empty.
Its really strange because when I put the burnt dvds in the unit, what you see in My Pc changes, from DVD-RW Unit to CD Unit.
In other computers the dvds work properly, and I can see what I have burnt!
I don´t know what to do, after reading a lot of posts here, I have upgraded the firmware to 0C12 and the same problem. I have made a discinfo file, which says:

DISCINFO VERSION : 1.6.1.6
VENDOR : HL-DT-ST
MODEL : DVD-RW GWA-4080N
REVISION : 0C12
LOADING MECHANISM : Tray
SERIAL NUMBER : K054A2C2249
NUMBER VOL. LEVELS : 256
BUFFER SIZE : 2048KB
INTERFACE : ATAPI
RPC2 SCHEME : YES
STATUS : Set
USER CHANGES : 4
VENDOR CHANGES : 4
CURRENT REGION : 2
ANALOG AUDIO PLAY : YES
COMPOSITE OUTPUT : NO
DIGITAL PORT-PORT1 : NO
DIGITAL PORT-PORT2 : NO
READ UPC CODE : YES
MULTISESSION READ : YES
MODE 2 FORM 1 : YES
MODE 2 FORM 2 : YES
READ ISRC CODE : YES
READ BAD CODE : NO
BUFFER UNDER-RUN : YES
MT. RAINIER : NO
CAN READ CDR : YES
CAN READ CDRW : YES
CAN READ CDRM2 : YES
CAN WRITE CDR : YES
CAN WRITE CDRW : YES
CAN TEST WRITE : YES
CAN READ DVD-ROM : YES
CAN READ DVD-R : YES
CAN READ DVD-RW : YES
CAN READ DVD-RAM : NO
CAN READ DVD+R : YES
CAN READ DVD+RW : YES
CAN WRITE DVD-R : YES
CAN WRITE DVD-RW : YES
CAN WRITE DVD-RAM : NO
CAN WRITE DVD+R : YES
CAN WRITE DVD+RW : YES
MAX CDR READ SPEED : 24
MAX CDR WRITE SPEED: 24

I need help!
Thank you very much!
And I´m sorry about my english, I am Spanish!