Guys, thanx for all your replies..the new drive seems to work fine..I burn dvds like crazy now..the local support for the drive in my country was very good..they gave my the replacment drive in less than two weeks..ooh BTW I just received the answer to my problem from sony support via e-mail(after 3 weeks of waiting).It is rediculous..I described the problem of my drive and this was their answer(the answer came after the local support in my country replaced my drive with a new one):
Elias,
Did you follow all the instructions when getting the firmware? Did you
remove the Nero software?
Unfortunately we do not support the Nero or X Copy with our drives. If
you
are having issues with that, then you would need to contact them.
Until you
are using the bundled software you will not get support from us.
Thank you for contacting Sony Technical Support. To better assist you
please
include all previous emails. Please visit our website at
www.sony.com/storagsupport for all the latest software updates.
Thank You