I just burned two multisession DVD .which was having around 300 and 150 MB spaced free.the burn was something mysterious . and it took quite a long time but atlast it completed without any error.But after that.when I checked both the DVDs there was nothing burned,it was as earlier with previous s/w in it. I don't know what happened,but when I am clicking on "disc Info",it is showing that there are two sessions of burning which comprises the one which is burned just now I am talking about but no data on the DVD. a little bit of information. for both the session of burning.the the mode is different 1)ISO 9660/Joliet(mode1) 2)Data(mode1).