NX7000 DVD+RW (SONY DW-P50A) Problem in RW mode

Hi,

I just receive my wonderfull HP Nx7000 706A (XP Pro)
with the DVD+RW drive witch is a SONY DW-P50A.

Every thing goes perfectly :

CD read
CD-R (burn OK)
CD-RW (RW OK)
DVD read
DVD+R (burn OK)
....

But it's impossible to Write or Format or Quick Erase (DVD+RW mode) ...
I'm using MEMOREX DVD+RW discs (4.7Gb 1x - 4x)
I have tested all these operations with
"Roxio Easy-creator 5"
"Nero 6"
"NTI CD & DVD Maker"
and via the XP standard way of course

On the web, at the HP site, I found some comments around problem close to
this one :

"HP Pavilion Desktop PCs - Troubleshooting CD, CDRW, DVD and DVD+RW
Drives"
URL :
http://h20015.www2.hp.com/en/documen...on296697&cc=us

But I tried all the recommand and nothing happends.

I also found some messages on other forums from people telling that SONY
DVD+RW discs should work ...
I didn't yet try these kind of DVDs but for sure I will.

This SONY DVD+RW drive is n EOM onl delivred in Laptop like nx7000 or X1000
but not really officially supported by SONY ...
I can't expect any driver upgrade from SONY ... So I wish HP will do it !

PLEASE ... HELP ME !

Am I alone in this case ???

Best regards

Nikola Petanjko
(from Geneva - Switzerlaand)