I used nero 6 to burn a dvd , i used the start multisession setting and used a dvdrw disc. But when i put the disk intothe dvdrom drive and the dvdrw disc, its says the disc is empty.

Why is this happening?
When i launch nero and says im gonna add to a multisession, it displays the contents in the compilation list of what i added to be burned, so why cant i actually access anything as it knows the references to what i set out to burn?