Hi guys.
ok the story started when I was using the drive. I just put a DVD in it and worked with it with no problem then when I was trying to change the DVD I realized that the DVD is not opening (but the led is blinking). So I opened it by a needle and put the DVD in it! but the DVD didn't response at all!
The driver is installed and the DVD drive is recognized by windows 7. what I've done:
-uninstalling the driver and rebooting the system
-hard reseting the system
-tryed this: http://h30434.www3.hp.com/t5/Notebook-Hardware/HP-Pavilion-DV6-DVD-drive-not-recognized-and-media-reader/td-p/1454531/highlight/true but there was no upper and lower filters!
thanks for ur help :)