There are many things that could cause this, but I would first try this. Since it does read at first, but then doesn't respond after some time it may be a software problem. Find out the exact model of your Drive and Manufacturer. You can usually find the model on a sticker on the back, top, or bottom of the drive. Go to their website and see if you can download new Firmware for the drive. Many times the Firmware will correct problems that exists due to driver conflicts and/or Motherboard/OS compatibility. There will be instructions on how to do this on the manufacturers website. Try this first and if it doesnt work, it may be a bad drive.
the DVD CD-rw will not read DVD CD but will read CD