I bought a Liteon cd-dvd writer from wally world. connected it to power and usb port. Turned on the switch. The cd light came on and windows xp found the drive and installed the drivers. I opened the tray and placed a cd in. went to windows explorer and there was the drive! I clicked on the drive expecting to see the contents. NONE! I tried another CD. Same result. I checked the device manager and it says everything is working properly. Cn anyone help me? thanks, Paul