Dvd+rw

[the great one]

I hav a Lite-on DVDRW LH20A1P , Dvd rewriter which i hav recently bought.
Till now i had no problem wid it i hav wrote a lot of dvd's wid it using the nero software which came along wid it, but yesterday i purchased a Moserbaer Pro DVD+RW (Protection plus) (4x/4.7 GB), now i started writing files on it the files were written and the nero said dat burn process successfully completed, but wen i inserted the disk none of the files it was showing and also it says a cd drive instead of showing a dvd in it.
Wen i open it opens but no files r shown and also it says 0 bytes free & 0bytes total size.
I am using WIN XP PRO SP 2 along wid a dual boot VISTA.
1.6 Ghz , 512 Ram , 40 GB HDD(7 GB free) , 128 MB Nvidia Geforce.
Is there sum problem in the dvd or the dvd writer?
I was writing the dvd in WIN XP.

[ax3]

install isobuster & check the dvd .............