I have a Sony DVD drive that I installed in a Dell desktop computer running Windows XP Pro, a pentium lll 500 MHZ processor and 384 MB of RAM. Everything installed correctly and the drive was listed in the device manager and in "My Computer" as DVD DRIVE. I also added the correct video codecs so it would work. When I inserted A DVD, it would not read it. (I get this windows message "please insert DVD INTO DRIVE D") I tried the same experiment with a CD and IT WORKED FINE. Not only that, the same drive also writes CD's perfectly. But it just wont recognise DVD's. Very, very strange. I checked the cables and jumpers, everything is as it should be. I dont know whats going on here. Do I need a firmware upgrade or somthing like that?. Please help if you can. Thanks a million.