cd-rw on 300n writer

[Stefano Soldano]

Hello I just bought a new pavilion with a 300n dvd and cd writer, unfortunately it do not recognize cdrw disks. It is not possible to re-write them and very often it does not read the disk it wrote while those disks are readable on different cd-rom. Plus it is not possible to read or write different volume on the same cd-r
For example it writes a 300mb file on the disk but then it read it as full, while on a different writer on the same disk I can add other files.
I am starting to think the writer is defective, I tried many different software like Nero, Record Now, Direct CD but there has been no difference.
I use win xp.
Any suggestion or idea?