I have Sony VAIO laptop with DVD writer. From past few days my DVD ROM is not reading DVDs, but it is detecting all CDs. When i insert DVD, it is trying to read that DVD and it is on the same status but DVD is not getting detected. DVD ROM is giving some sounds. I am not sure whether there is any problem with my DVD ROM or the drives in my system. I am using XP operating system. The DVD disk which i am using is working well in other systems.