LG GSA-H42N problem reading DVD's

Hi, i’m new in this forum. I was looking for some info about this recorder and came up here :P. Well, since i’ve bought it i’m having serious trouble to read backups dvd and some original dvd. I put a dvd, start flashing the light, and after that, nothing, i get in the windows explorer, double click on the drive, and it opens but there’s nothing on it… In some lucky moments reads the dvd, but is annoying to try 10 times just to read a dvd. If someone knows about this problem, plz any help would be perfect. Thanks to all.

PD: srry for my poor english :$.